Designed to meet the unique needs of female physiology, our Women's Comfort Light S.I. Mat provides increased warmth and sleeping comfort for a great night's sleep, all year round. Smaller Delta Cores under the torso keeps more insulating PU foam intact, creating a warmer core body zone and greater insulation from the outside elements. Featuring a women's specific shape that is wider at the hip and narrower at the shoulder, the exterior anti-slip print ensures you don't slip when sleeping on sloping ground and the multi-function reversible high flow-rate valve allows fast and easy inflation and deflation. Wider at the hip and narrower at the shoulder Multi-function, high flow-rate valve Anti-slip print on top and base keeps it in place Continuous foam layer on top and bottom of Delta Cores eliminates cold spots along full mat length and provides better bonding with the shell fabrics Lightweight 30D polyester with extrusion laminated TPU used on top and base Large horizontal triangular cores reduce the weight and bulk without sacrificing support and comfort PillowLock attaches your Aeros pillow to your mat, holding it in place for a slip-free sleep Mat: 100% Polyester with TPU lamination; Valve 100% TPU; Insulation: 100% Polyurethane foam; Stuff Sack: 100% Polyester