Outstanding warmth meets convenience with the Therm A Rest ProLiteTM Plus Self Inflating Mattress. Constructed with diagonal cut foam, this all season mattress delivers greater warmth than the usual vertical channels and is ideal for ski touring, cold weather expeditions, and winter camping.. . 50d mini Hex Rip Polyester top fabric. 50d Polyester bottom fabric. Urethane foam. Thick, patent pending diagonal cut foam offers efficient year round comfort and warmth. Lightweight foam boosts compressibility for easy packing. Expanding foam core self inflates top it off with just a few breaths. Stuff sack included. R Value: 3.4. Weight: 1 lb. 6 oz.. Width: 20 in.. Length: 72 in.. Thickness: 1.5 in.. Packed Dimension: 11 in. x 4.8 in.. Built in the USA.