Visit our Showroom or Book an Appointment

More Info


Sea to Summit Comfort Deluxe S.I Mat

Option: Regular Wide

The Sea to Summit Comfort Deluxe Self Inflating Mat are sleeping mats that provide ultimate comfort over night, with the support of a foam core and the benefit of self-inflating technology.

Luxuriously extravagant, and with season comfort, the Sea to Summit Comfort Deluxe Self Inflating Mat fulfils the expectations of the most demanding camper. Using 'Delta Core' technology ensures the optimal amount of foam to comfort ratio -while also reducing the packed volume without sacrificing support or durability. A multi-function valve allows the mat to be rolled and stowed tightly without fighting re-inflation as you go, while diagonal supporting foam 'walls' help with structure once that mat is inflated.

For the added insulation, Sea to Summit use Exkin® Platinum, a quiet non-woven fabric, to reflect radiant heat loss back to the user and Thermolite® insulation to prevent convective heat loss between your body and the ground. An R-Value of 6.5 and a depth of 4 inches, the Comfort Deluxe will keep you insulated and supported for a great nights sleep. Perfect for car camping, canoeing or extended trips where a slight weight penalty isn't an issue. 


Below is a video from Sea to Summit detailing the features of the Comfort Deluxe S.I Mat range.


  • Multi-function valve for easy inflation, deflation and fine tuning of air pressure
  • 30D stretch-knit fabric on the sleeping surface offers the right balance between comfort and durability, while extrusion laminated TPU is used on the base
  • Sea to Summit's TPU lamination process - one used in the medical and aeronautical industries but unique to the outdoor industry - is vastly superior to the roll-to-roll lamination process that is commonly used in outdoor products at present. The TPU bonds better and more consistently, virtually eliminating delamination issues
  • Comes with a quality stuff sack and a repair kit containing six self adhesive patches for repairing punctures in the field
  • Sea to Summit’s Comfort Deluxe mats should be used right side up. A Sea to Summit logo and size graphic are printed on the side of the mat that should be up when in use
  • Extended storage instructions: mat should be laid flat, folded as few times as possible with valves open
  • PillowLock attaches your Aeros pillow to your mat, holding it in place for a slip-free sleep


  • Length/Width: Regular Wide 183 x 64 cm | Large Wide 201 x 76 cm | Double 201 x 132cm
  • Rolled Size: Regular Wide Ø18.5 x 64cm | Large Ø20.5 x 76cm | Double Ø28 x 64cm
  • Thickness: 10cm
  • R Value 6.5
  • Construction: Delta Core
  • Shape: Rectangle
  • Weight: Regular Wide 1840g | Large Wide 2410g | Double 4225g

Related Collections

Personal Shopping - By Appointment

Would you like to try on some climbing shoes, running shoes or mountain boots for size before you make your purchase? If so, then why not book an appointment with us today! We can offer you a bespoke one-on-one shopping experience with one of our experienced staff members.

Customer Reviews

Based on 3 reviews
Sea to Summit Comfort Deluxe SI Sleeping Mat Double

I’m old(er) and a bit wiser so choose lightweight comfort over ultralight. It really is as comfy as my bed at home! Plenty big enough for two, quiet and softer on the top, tougher on the base. The clever reversible valves make packing up easier than most SI mats, fold it to expel and then roll it works well. Never had an issue with any of my S2S products yet. Worth the ££.

peter smith
Best Mat so far

Seemed a lot to spend but considering how many SI mats I've bought and they never last, I'm hoping to get more use from this. Definitely comfy.

Fabulous Mat

Perfect for what I needed it for and so comfortable. Took me a while to decide which mat to go for and I’m very happy with my purchase.