Extra-thick 4-inch, lightweight air mattress provides a plush, women’s-specific sleeping surface for 3-season (3.5 R-Value) backpacking, camping, and bike touring Single-layer Air Sprung Cell construction mimics a spring mattress; women’s pad is cut narrower at the shoulders and wider around the hips and knees Multi-function valve for fast inflation in just a few breaths (using integrated Airstream Pumpsack), one-way deflation for quick packup, and fine-tuning of air pressure Insulated pad features high-loft fiberfill and reflective fabric, to prevent heat loss and radiate heat back during sleep; non-slip 30D/40D nylon face fabric is durable and quiet Large size measures 72 x 25 x 4 inches, packs to 4.75 x 11 inches, weighs 1.3 pounds; includes stuff sack, field repair kit, and PillowLock patches for securing a Sea to Summit pillow to mat