4-season luxury foam sleeping pad is 4 inches thick, with vertical sidewalls, for maximum warmth and comfort for camping, home, and travel Multi-function reversible valve for fast and easy inflation, one-way deflation for quick packup, and fine-tuning of air pressure Innovative coring technique reduces weight and packed volume, while maintaining durability and warmth; 6.5 R-Value ensures that pad will insulate in the coldest temperatures 30D stretch knit top fabric is soft and cozy; durable 75D polyester with laminated TPU used on base Regular size measures 72 x 25 x 4 inches, packs to 7 x 26.5 inches, weighs 4.4 pounds; includes stuff sack, field repair kit, and PillowLock patches for securing a Sea to Summit pillow to mat The Sea to Summit Comfort Deluxe Self-Inflating Foam Camping Mattress is a 4-season luxury foam sleeping pad, for camping, home and travel. At 4 inches thick, with vertical sidewalls for maximum sleeping surface, it brings the comfort of home to basecamp. The multi-function reversible valve allows for fast and easy inflation, one-way deflation for quick packup, and fine-tuning of air pressure for a good night’s sleep. Sea to Summit’s innovative Delta Core technology removes foam weight and bulk, while maintaining durability and warmth. With an R-Value of 6.5, it insulates from the cold in all seasons, even winter (R-Value measures the material’s ability to insulate; the higher the R-value, the warmer the sleeping pad). Soft 30D stretch knit top fabric is soft and cozy; a durable 75D polyester with laminated TPU is used on the base. The Sea to Summit Comfort Deluxe Self-Inflating Foam Camping Mattress is available in two sizes: Regular measures 72 x 25 x 4 inches, packs to 7 x 26.5 inches, weighs 4.4 pounds; Large measures 79 x 29 x 4 inches, packs to 7 x 31 inches, weighs 5.8 pounds. Includes stuff sack, field repair kit, and PillowLock patches for securing a Sea to Summit pillow to mat. Sea to Summit products are guaranteed against defects in materials or workmanship for the lifetime of the product.