Comfort Deluxe Self-Inflating Sleeping Mat

The Sea to Summit XPEL Valve was the first valve developed specifically for self-inflating sleeping mats. It integrates a one-way inflate port, a large deflate port and a fine-tune button into a single, low-profile unit. The genius of the XPEL valve is that to deflate the sleeping mat, the valve is flipped over, allowing air to escape but not return into the mat.

This turns the one-way inflate valve into a one-way deflate valve - preventing the mat from drawing itself full of air as it is rolled up.

The XPEL valve fits the nozzle of an Airstream pump (sold separately) if you want to 'top up' your self-inflating mat which you can also do manually.

The Pillow Lock System comprises of self-adhesive hook-and-loop patches which are supplied with all Sea to Summit sleeping mats (as of Spring 2019). Attached to your sleeping mat, these patches secure your pillow and prevent it slipping – yet they will not snag on clothing or other lightweight fabrics. All Sea to Summit Pillows (as of Spring 2019) are compatible with this system. Existing pillows can be made Pillow Lock compatible by adding an Aeros Pillow Case.

The innovative Delta Core system maximizes the comfort and thickness of our Self Inflating mattresses while minimizing weight and bulk. 40% of the initial volume of the PU foam is removed in horizontal Delta-shaped cores, giving minimal weight and packed size. Importantly, the top and bottom surface of the PU foam remain completely intact. This ensures consistent warmth along the full length of the mattress and significantly improves bonding of the foam to the shell fabric, which reduces the chance of delamination.

The shape and size of the Delta Cores are adjusted across the different thicknesses of our mattresses to ensure strength and durability combined with excellent support. The horizontal Delta Core technique is used in our Comfort Light SI, Comfort Plus SI, and Comfort Deluxe SI models.