The Exped Air Pillow uses next to the skin friendly tricot polyester & is anatomically shaped to accommodate side or back sleepers. Basically its a wedge shape; thicker on one side for those who sleep on their side, & thinner on the other side for back sleepers. The middle of the pillow is shaped with a depression to keep your head in place during the night. This medium size pillow fits perfectly inside most mummy shaped sleeping bag hoods or use the two handy tie loops to thread up a lace or some paracord to attach the pillow directly to your Exped mat. Featuring flat valve technology for fast inflation & deflation. Comes complete with stuffsac & repair kit. Adjustable for side or back sleepers Anatomically shaped to hold your head in place Flat valve technology for easy inflation & deflation Attachment points repair kit & stuffsac included