SKU: 16402387266

Sea To Summit Ultralight Women's SI Sleeping Mat Large

Sale price$161.95 Regular price$179.95
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Ships within 48 hours · Estimated delivery Aug 10 - Aug 15

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Description

Sea To Summit Ultralight Women's SI Sleeping Mat LargeDesigned to meet the unique needs of female physiology, our Womens Ultra Light S. I. Mat provides increased warmth and sleeping comfort in a small and light package. The foam used in our Womens specific Delta Core V graduated pattern uses a mix of smaller holes and solid foam under core body zones for extra warmth where women often feel the cold most. Featuring a womens specific shape that is wider at the hip and narrower at the shoulder, the anti

Designed to meet the unique needs of female physiology, our Women’s Ultra Light S.I. Mat provides increased warmth and sleeping comfort in a small and light package. The foam used in our Women’s specific Delta Core-V graduated pattern uses a mix of smaller holes and solid foam under core body zones for extra warmth where women often feel the cold most. Featuring a women’s specific shape that is wider at the hip and narrower at the shoulder, the anti-slip print on the top and base of the mat holds it in place when camping on sloping ground is unavoidable. Made from lightweight 30D polyester with extrusion laminated TPU, it packs down incredibly small for minimalist adventures.

FEATURES

  • Women’s specific Delta Core profile developed to create warmer core body zones
  • Wider at the hip and narrower at the shoulder
  • Multi-function, high flow-rate valve
  • Larger vertical Delta Cores in non-body contact areas reduce the mat’s weight and bulk
  • Anti-slip print on top and base keeps it in place
  • Lightweight 30D polyester with extrusion laminated TPU used on top and base
  • Pillow Lock attaches your Aeros pillow to your mat, holding it in place for a slip-free sleep

TECH SPECS

Weight
L: 645g
Dimensions
L: 183 x 53 x 2.5cm
Material

Outer: 100% Nylon with TPU Lamination
Insulation: 100% Polyester
Valve: 100% TPU
Valve Flap: 100% Silicone
Stuff sack: 100% Polyester

Packed dimensions
L: Ø13.4 x 30cm
Thickness

2.5cm

R-value

2.9

MENTION IN THE COMMENTS IN THE CHECKOUT SECTION THAT YOU ARE A CADET AND WE WILL THROW IN A FREE GIFT FOR ORDERS OVER $50

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: 16402387266

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4.2 ★★★★★
Based on 19 reviews
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Kimberly
Boise, US
★★★★★ 5
Snagged a deal
Size: 7, Color: Redwood/Gum 10
I waited and waited to get these boots! I knew I was chancing it, but they went on sale, and I snagged them! I am a size 7, and they fit nicely with socks. a little loose, barefooted, but what psycho wears boots without socks? They are comfortable and really well-made.
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Reviewed in the United States on April 8, 2026
A
Verified Purchase
ashlynnk
Natrona Heights, US
★★★★★ 4
Cute, comfortable waterproof boots (a little snug to put on)
Size: 7, Color: Velvet Tan/Gum 2
These are really cute Chelsea-style boots and feel very comfortable once they’re on. The waterproof material is great for wet weather and the sole feels sturdy with good traction. They look stylish enough to wear casually but still feel practical for rainy days. The only downside is they can be a little difficult to put on at first because the opening is somewhat snug, but once they’re on they fit well and feel supportive. Overall they’re a great waterproof boot and I’ve enjoyed wearing them.
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Reviewed in the United States on March 17, 2026
A
Verified Purchase
Abby B
Pawtucket, US
★★★★★ 5
Surprisingly great for my wide feet and high instep!
Size: 10.5, Color: Velvet Tan/Gum 2
So thrilled I took a chance on these. Finding boots is impossible for me. I have wide feet, a super high instep, a bunion on one foot, and I wear a hard to find size (10.5). I ordered the 10.5 and 11 in these expecting I might need to size up for width (if I could even get them on). It was a struggle getting the 10.5s on the first time, and once I did they were somewhat uncomfortable on the top of my left foot. But I read that they would relax so decided to give it a go because I need waterproof boots for an upcoming trip and the 11s felt too long. After two days of light wear, they are already breaking in and I have no more discomfort. Getting them on is already easier and they are plenty wide enough and very comfortable to walk in. These are true to size. Super happy and worth a day of mild discomfort to break them in!
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Reviewed in the United States on March 7, 2026
E
Verified Purchase
EE
Charlottesville, US
★★★★★ 5
Comfortable, sturdy, waterproof
Size: 9.5, Color: Black/Black
Loce, love, love these boots. Have walked ten miles with no foot pain around NYC. They go with everything and and are so comfortable. As they are waterproof/resistant, they get a little warm in high temps, but perfect three-season boots.
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Reviewed in the United States on May 17, 2026
K
Verified Purchase
Kate
Alexandria, US
★★★★★ 5
Super cute, comfortable, practical, love that they are slip on
Size: 10.5, Color: Tobacco/Black
I have worn these 2-3 times already. The first day was a school/work day so I was on my feet 9 hours and the only issue I had was with the side of the boot rubbing against my ankle. I just make sure I wear socks high enough to cover my ankles or jeans that go into the boots now for long wear days. Absolutely love them! They keep my feet dry in this snow( we live in Michigan). I had been looking for a pair like this for awhile now and was getting super frustrated that I couldn't find my size in any that I liked. I saw that they had these available in a 10.5 and I wear 11. I looked at the Sorel website reviews (since the amazon ones weren't super helpful on sizing) and they said that the boots ran big so I took a chance on the 10.5 fitting me. They fit perfect. I have long narrow feet but I could see where they would be tight or uncomfortable on someone with wider feet. I've been trying to find a pair for my mom now since she has boot envy.
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Reviewed in the United States on January 27, 2026

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