SKU: 26628232455

Ti-MNPara Strap 20mm - Black

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Description

Ti-MNPara Strap 20mm - BlackThe SPD Edition Ti MNPara Strap in 20mm is a Marine Nationale style elastic watch strap built with 100% titanium hardware and best grade nylon Spandex webbing. Inspired by the field made parachute elastic straps fashioned by French Navy combat divers in the 1960s and 70s, our version eliminates magnetic interference, resists corrosion in salt water and on land, and adjusts in seconds over a wetsuit or a bare wrist. Fits any watch with 20mm lugs with

The SPD Edition Ti-MNPara Strap in 20mm is a Marine Nationale style elastic watch strap built with 100% titanium hardware and best-grade nylon-Spandex webbing. Inspired by the field-made parachute elastic straps fashioned by French Navy combat divers in the 1960s and 70s, our version eliminates magnetic interference, resists corrosion in salt water and on land, and adjusts in seconds over a wetsuit or a bare wrist. Fits any watch with 20mm lugs with removable spring bars, and some with fixed bars (due the extra durable nature of the new elastic webbing being used, the doubled over end might be too thick to pass through some fixed bar cases without tools to aid in installment). One of the most comfortable and adjustable elastic watch straps made today.

The Marine Nationale strap was not designed in a workshop. It was improvised at sea.

In the 1960s, the French Navy was issuing dive watches to its combat swimmers, the Nageurs de Combat of Commando Hubert, without straps. Tudor Submariners, Doxa Sub 300T, Jacques Bianchi JB300, Triton, ZRC. The watch heads arrived. The means of wearing them did not. Faced with the need for a strap that could be sized in the dark, adjusted over a 7mm neoprene wetsuit, and survive repeated salt water immersion, the operators reached for what they had on hand: surplus elastic webbing recovered from French-issue parachute rigging. They cut it, stitched it, fitted it with simple metal rings and a folding hook closure, and went to work. The result, recognizable today by its olive-and-yellow or red-striped weave, became one of the most quietly influential pieces of military horological gear of the 20th century.

That original field-made strap is the direct ancestor of every modern Marine Nationale style strap on the market. The reference Tudor 9401 dated 1977, now held in the Tudor archive, is documented as having been issued with a strap fashioned from parachute belting. Tudor itself acknowledged this heritage publicly in 2021 when it formalized its partnership with the Marine Nationale and launched the Pelagos FXD.

The SPD Ti-MNPara takes the original concept and rebuilds it for the modern wearer who carries a watch alongside other tools. We start with a heavy nylon webbing woven with Spandex, which holds its elastic memory significantly longer than the generic rubber-cored elastics used in lower-grade straps. We then replace every piece of metal hardware with Grade 5 6AL-4V titanium: both keeper rings, the buckle, and the closure. Titanium delivers three properties stainless steel cannot. It is fully non-magnetic, so it will not become magnetized by rare earth magnets used in modern wallets, key fobs, and EDC pouches, and it will not transfer that magnetism to the movement of a mechanical watch. It is fully corrosion-proof, indifferent to salt water, sweat, and chlorinated pools. And it is roughly 40% lighter than stainless at equivalent strength.

The non-magnetic property matters most to the wearer who pairs a watch with a wrist-mounted compass. Stainless hardware, once magnetized through prolonged contact with strong magnets, will deflect a compass needle by several degrees. Titanium will not. The Ti-MNPara is built to be worn with the PDW Expedition Watch Band Compass Kit, a wrist compass, or any field-grade navigation tool without introducing magnetic error into the bezel.

One strap, no spring bars to lose under load, an infinite range of micro-adjustment, and hardware that will outlast the watch it is fitted to. Carryology named the SPD Ti-MNPara a Best New Carry selection in February 2023. It works on a many Tudors. It works on a Panerai. It works on a 1970s Submariner. It works on whatever you put it on, as long as the lugs measure 20mm.

Find a way or make one.

Specifications:

Materials:
  • Titanium
  • Nylon with Spandex
Dimensions:
  • Strap Width: 20mm
  • OAL: 142mm (min) - 253mm (max)
  • Strap Thickness: 2.00mm
Approx. Weight:
  • 0.4oz / 11.34g
Features:
  • Most Adjustable and Comfortable Nylon Type Strap Available
  • Fits Watches with 20mm Lugs
  • Black Strapping
  • Split End Buckle to Fixed Bar Watch Case Fitment
  • Rings and Clasp 100% Non-Magnetic
  • Rings and Clasp 100% Corrosion-Proof
  • Best in Class Durable and Pliable Woven Nylon with Spandex
  • 100% Titanium Hardware
  • Secure and Easy On/Off Clasp
  • Fits XS to XL Wrists
  • Easily Adjusts Over Wetsuits
  • Not recommended for quartz watches with sensor backs.
Marks:
  • Laser Etched SPD Kraken Trident
Recognition:
  • Carryology Best New Carry, February 2023

FAQ

What is a Marine Nationale watch strap?

A Marine Nationale strap, sometimes shortened to MN strap, is an elastic single-pass watch strap originally improvised in the 1960s and 1970s by combat swimmers of the French Navy, the Marine Nationale, using webbing recovered from military parachute rigging. The original strap typically used a folding metal hook and two keeper rings. It allowed the diver to size the strap over a wetsuit, retain the watch against the wrist under load, and adjust in seconds without buckle holes or pins. The PDW Ti-MNPara is a modern interpretation of that original field-made design.

What is the difference between the PDW Ti-MNPara and a standard Marine Nationale strap?

Two material differences and one performance difference. First, the PDW Ti-MNPara uses 100% Grade 5 6AL-4V titanium for every piece of hardware, where most MN straps on the market use stainless steel or plated brass. Second, our webbing is a woven nylon and Spandex blend chosen for elastic memory retention, where many MN straps use rubber-cored elastic that fatigues over time. The performance result is a strap that is fully non-magnetic, fully corrosion-proof, and significantly lighter than a stainless equivalent.

Why does titanium hardware matter on a watch strap?

Three reasons. Titanium is non-magnetic, so the hardware cannot be magnetized by contact with rare earth magnets in modern wallets, phone cases, key fobs, and EDC pouches. A magnetized strap will magnetize a mechanical watch movement and will deflect any wrist-mounted compass, both of which are real failure modes for field users. Titanium is also fully corrosion-proof in salt water, sweat, and chlorinated water, where even 316L stainless will eventually develop crevice corrosion. And titanium is roughly 40% lighter than stainless at equivalent tensile strength.

Will the Ti-MNPara fit my watch?

The Ti-MNPara fits any watch with 20mm lug width and removable spring bars. Common applications include the pre-2020 year Rolex Submariners, SPD X MKII Paradive, Tudor Black Bay 58, Yema Skin Diver, Vulcain Skin Diver and more. If your watch has 20mm this strap will fit. *Please note, that we cannot verify fitment for every fixed bar watch, but the updated Ti-MNPara should fit the majority of fixed bar watches available.

Can I wear the Ti-MNPara with the PDW Expedition Watch Band Compass Kit?

Yes, and this is one of the reasons it was designed the way it was. The PDW wrist compass features a split mounting slider allowing to fit over the elastic strapping in-between the buckles. Wrist-mounted compasses are highly sensitive to magnetic interference from nearby ferrous hardware. A stainless steel strap, once magnetized through extended contact with rare earth magnets, will introduce several degrees of deflection into a compass bezel reading. The titanium hardware of the Ti-MNPara is fully non-magnetic and will not influence the compass needle, making it the correct strap pairing for any navigation-capable watch setup.

Is the Ti-MNPara safe for use with my mechanical watch?

Yes. Because the hardware is titanium and fully non-magnetic, it cannot transfer magnetic charge to the watch movement. Magnetization is one of the most common causes of timekeeping error in mechanical watches and is increasingly common in modern daily carry because of the prevalence of rare earth magnets in wallets, sleeves, and bag closures. The Ti-MNPara isolates the watch from that risk. Note: not recommended for quartz watches with skin-contact sensors on the case back, as the elastic webbing can interfere with sensor contact.

How do I size the strap to my wrist?

The Ti-MNPara is a single-pass elastic strap. You thread the strap through the spring bars of the watch, around the wrist, through the keeper rings, and secure it through the clasp. The elastic webbing allows the strap to stretch slightly over the hand and then contract to wrist size, holding the watch firmly in place. Length is adjustable by feeding more or less webbing through the keeper rings before securing. Total adjustment range is 142mm to 253mm, which fits XS to XL wrists and accommodates wear over a wetsuit.

What is the history of the Marine Nationale strap?

In the late 1950s and through the 1960s and 1970s, the French Navy issued dive watches to its Nageurs de Combat, the combat swimmer unit known today as Commando Hubert, without straps. The watches arrived as bare watch heads. Operators sourced or fabricated their own straps in the field, frequently using elastic webbing salvaged from military parachute rigging. Tudor archive records reference 9401 dated 1977, fitted with a strap made from parachute belting, as a documented example. The improvised design proved so well-suited to underwater and field use that it has been replicated commercially ever since, and was formally acknowledged by Tudor in 2021 with the launch of the Pelagos FXD, designed specifically for through-passing elastic straps.

Is the Ti-MNPara made in the USA?

The Ti-MNPara is designed by Prometheus Design Werx in San Francisco. Hardware is formed from Grade 5 6AL-4V titanium and the webbing is sourced and assembled to PDW specification in Asia.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 26628232455

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4.9 ★★★★★
Based on 9 reviews
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Product Reviews
J
Verified Purchase
Jonathan H.
Cuba, US
★★★★★ 1
Poor quality — squeaker lasts 2 minutes
Color: Blue Squeak Toy, Size: Medium
These balls used to be great quality and long lasting. Something changed about a year ago and now the quality is considerably less to include the squeaker becoming inoperable within 2 mins of play. Not sure if the raw materials or the manufacturing process changed, however the decline in quality is obvious. I do not recommend this product to anyone who has a dog that is larger than 10-15 lbs.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 16, 2026
L
Verified Purchase
LizO
Draper, US
★★★★★ 4
STROBE: Favorite Ball, durable, decent battery life
Color: Glow in the Dark Strobe Toy, Size: Medium
*Update since Outward Hound redesign: The new version doesn't seem to light up as consistently on every bounce and seems to light up in a more seizure inducing way (I'm sorry I couldn't think of a better description). The light also seems to die much faster with the new version. The inner light and batter actually popped out its encasement in one ball after about 2 months of use, only by my Golden who doesn't chew particularly forcefully on it. I did notice right away and check regularly for damage, just putting that out there as a warning. It is still by far my dog's favorite ball. Original: This is my Golden Retriever's absolute favorite ball! Particularly the strobe light up ball but she's happy with any Planet Dog ball to the point that she looks at me for the "good ball" to fetch with if i try to have her play with a ball from a different company. Pros: by far my dog's favorite ball - good bounce, and good squish factor yet durable -larger size: safe for large dogs -lights up to see at night -decent battery life -rain does not affect battery Cons: -battery is not replaceable/ rechargeable (though I'm not sure it's an option without seriously altering the design) -regular glow (once battery is dead) is not great -only lights up on a bounce and shortly after that - If your dog bites down particularly forcefully it can displace the battery which typically kills it; if submerged in water (my dog tends to place it in her water bowl when she takes a break while fetching), it is reduces battery life, both make me worry about safety The ball always out lasts the lifespan of the battery for the light, I'd say we average about 1 month per ball while the light works with about 1 hour of use almost everyday. The ball does hold up to some of my dog's friends that are super chewers including one that is a Cane Corso. I don't let them sit and work at chewing it but they definitely squeeze it in their mouths with a good bit of force. My girl is happy to play with the ball even once the battery dies but I prefer to have the light so I can find the ball when needed. The glow color does glow when placed under a flashlight for a few minutes first but I find it doesn't glow as well or as long as other company's glow toys. My dog has a tendency to drown it in her water bowl to keep it nearby or rinse off any dirt and that definitely shortens the battery life but using it in the rain doesn't seem to affect the battery life I think this being my dog's favorite has to do with the good bounce and squeeze factor this ball has. I like that it's slightly bigger than a tennis ball so I'm comfortable with large dogs playing with it. It fits in the "large" chuck it ball launcher. I actually discovered this specific ball when another dog had it and my dog kept taking it instead of her other light up ball that she had played with happily for months.
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Reviewed in the United States on September 10, 2023
S
Verified Purchase
Sherry
San Leandro, US
★★★★★ 5
Great for my pitbull, worth the price! the warranty isn’t what it seems so check their site first.
Color: Orange Squeak Toy, Size: Medium
I’ve now purchased 3 and I don’t see myself ever stopping! My 55lb Staffie (pitbull) has absolutely obliterated every ball and toy (rope, rubber, stuffed) before this one in a matter of minutes. You take your eyes off it, and the next time you’d look back it would be in pieces. Kong Xtremes and other “indestructible” toys only lasted a week, tops. He also goes nuts for anything that squeaks, so keeping him happily entertained for a while was a challenge because the second he’d chomp down on a squeaker, it’d break. He’s now had this blue squeak ball for a MONTH and it STILL SQUEAKS!! He regularly falls asleep with it still in his mouth, or tucked under his chin. That’s how obsessed he is with this thing. I would 100% recommend this to anyone who needs a seriously durable toy for their super powerful chewer as that’s been my experience! This material is super bouncy and he can bite down (unlike some rubbers, Kong/West Paw) without puncturing it somehow. It’s perfect for fetch, and floats too. He’s never had a toy last this long, so this is a welcome break for my wallet despite being a more expensive toy. I was buying a few toys every week until we tried this one! Cons: The first two balls didn’t squeak after a few days, so maybe they’ve improved something since then. The warranty replacement process is more tedious than others like West Paw, and only replaces them ONCE. It’s also requires more force to squeak this given the nature of the material, but since it extends the life of the squeaker I’m totally fine with it.
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Reviewed in the United States on December 13, 2018
M
Verified Purchase
Michael F
Houston, US
★★★★★ 5
This ball has lasted and still have it after many months or longer. My dog loves it.
Color: Pink Squeak Toy, Size: Medium
My Belgian Malinois can really chew through inferior play toys and balls, etc., and this is one of the few that has lasted a long time, and he really likes it. Another bonus is that it gets quite slippery with his saliva and the ball will bounce a little bit unevenly, so it can either slip out of his mouth or bounce in an unexpected direction that can fool him. He has such quick reactions that is hard to get a ball past him, but with this ball, I can score extra points on him when he can't block it. Otherwise I have no chance, and he beats me every time.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 21, 2025
S
Verified Purchase
stlvapegurl
Los Angeles, US
★★★★★ 3
Please go back to the original ball design and squeaker!!
Color: Pink Squeak Toy, Size: Medium, Color: Pink Squeak Toy, Size: Medium
Review update: I am updating my review for a few reasons. 1) The ball I ordered below was the 3rd time I purchased it. I originally bought one years ago, Pre-Covid, for my old pitty. My now Corgi, Jett loved that ball so I got a 2nd one for times when we couldn’t find the original. Well, the ball was slightly larger, the squeaker stopped working, and Jett preferred the original. 2) The newest one doesn’t squeak at all and is also slightly larger than the original. The original fell down the sewer drain that is in our backyard, and we lost the 2nd ball, so we ordered the ball again. My husband ended up having to retrieve the original from the sewer drain because Jett would pace around the sewer looking for the original. I ended up returning the 3rd ball because Jett doesn’t want anything to do with it & it doesn’t squeak. The video I provided is Jett squeaking the original that is at least 5-6 years old. I highly recommend the company go back to the original design that has not only stood the test of time and heavy use but is also the preferred size and for some reason has a much better, more reliable squeaker. I bought 2 of these balls for my Corgi mix and another for my son’s girlfriend’s Golden Retriever. Both dogs love the ball. They love the squeak and the ball is very durable. The ball doesn’t easily squeak by hand but will when they bite down on the ball or when it bounces. Speaking of, it has a decent amount of bounce to it too. Our dog loves to jump in the air to catch it after it bounces off the ground. I highly recommend this ball for medium and large dogs.
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Reviewed in the United States on December 24, 2023

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