Recently added item(s) ×

You have no items in your shopping cart.

  • Awesome Gear, Amazing Service

Sea to Summit Comfort Plus SI Mat



* Required Fields


Availability: In Stock!

Ships tomorrow.

Availability: In Stock!

Ships tomorrow.
Item # STSAA211M
A warm, plush option for backpacking or camping, the Sea to Summit Comfort Plus SI Mat utilizes unique die-cutting to achieve a 4.1 R-Value and provide a 3”-thick sleeping base.
100% Satisfaction Guaranteed

Shop with Confidence - 1-Year No-Matter-What Returns




A warm, plush option for backpacking or camping, the Sea to Summit Comfort Plus SI Mat utilizes unique die-cutting to achieve a 4.1 R-Value and provide a 3”-thick sleeping base.

The tapered, self-inflating pad uses Delta Core Technology to create supportive cushioning, deliver consistent warmth, and make inflation efficient. Triangular cutaways within the open-cell foam core add structural support while cutting down on bulk and enabling the mattress to roll up more compactly when not in use. The 30D stretch-knit top fabric feels cozy next to skin and the 30D plain-weave base fabric bolsters durability.

A stand-out feature on Sea to Summit pads is the low-profile multi-function valve. A one-way design allows for fuss-free inflation and an internal button lets you make micro adjustments to firmness. A larger port beneath the top portion of the valve makes deflation quick and easy. Additionally, by setting flush to the surface of the pad, the valve also cuts down on potential warranty issues.

Available in your choice of Regular (72” x 20” x 3”) and Large (78” x 25” x 3”) size options, the Sea to Summit Comfort Plus SI Mat includes a custom-fit 30D stuff sack.

  • Delta Core Technology minimizes weight and bulk while maximizing warmth
  • Patent-pending multi-functional one-way valve for easy inflation and deflation
  • 30D stretch-knit polyester top allows the mat to conform to your body weight
  • 30D plain-weave base with anti-slip silicone print
  • Polyurethane self-inflating foam
  • 30D stuff sack included
  • R-value of 4.1
  • Extended storage instructions: mat should be laid flat, folded as few times as possible with valve open



Best Use Backpacking, Camping
R-Value 4.1
Item Weight Regular: 1 lb, 15 oz
Large: 2 lb, 8 oz
Dimensions Regular: 72" x 20" x 3"
Large: 78" x 25" x 3"
Other Stuff Sack and Repair Kit Included
Warranty Limited Lifetime
Type Self-Inflating Sleeping Pad


Real Customer Reviews

Average Rating:
(based on 4 real customer reviews)

4 Items

Great with some quirks.
Reviewed by Andrew O. - September 18, 2018

Likes: Comfortable
Easily inflated
R value is solid
Not to heavy

Dislikes: Bulky (naturally for a si pad)
Very difficult to put back into stuff sack

Nice Mat!
Reviewed by Scott B. - July 2, 2018

Likes: Good for a side sleeper. It's quiet, with no crinkling sounds. Well insulated. Comfortable.
Compression sack: Set valve to deflate mode. Fold mattress in half width-wise, use your body to smoosh the air out. Then fold it in half, length-wise, and use your body to smoosh more air out. Unfold. Fold in half width-wise, and roll it up. Cap the valve. Done. It's not bad, really.

Dislikes: I don't care for the color. It didn't come with a repair kit, I'm not sure if it was supposed to or not.

Great Product
Reviewed by Amanda G. - June 4, 2018

Likes: Fits to my sleeping bag perfectly, very comfortable, minimal noise, easy to inflate

Dislikes: Nearly impossible to make small enough to fit back into its original bag

Reviewed by Logan S. - April 9, 2018

Likes: This is probably the most comfortable sleeping pad you can get for backpacking. I'm a pretty lean packer, but I always make sure I have good sleeping gear, well worth it.

Dislikes: The sack they give you is tiny, almost impossible to get back into once it is no longer factory rolled. Not the biggest drawback, just gotta get a different one.

Earn Gear Points for Reviewing Products

Join our FREE Inside Edge program and receive 20% off a full-price item. Earn discount points for reviewing items you purchase and receive exclusive discounts.

What are points?
As a member you can share reviews of items you purchase and we'll reward you with discount points valued at 5% of the item's original purchase price.

It’s EASY and it’s FREE.

Sign Up Today »