Description of Insul-Mat AO Aero Mountain Petite Sleeping Pad - Women's An upgrade from our original 4 season self inflating sleeping pads the New AO Aero Mtn pads utilize Aerogel insulation to further insulate you from the elements. Aerogel is a super insulator that Insul-Mat has integrated between the existing horizontal drill tubes to further inhibit heat transfer through the foam of the pad. The air-core tubes keep you on the pad while complementing the weight shaving mummy shape. These pads sleep like they're 25" wide, provide 10% to 15% more insulation than their predecessors but still carry like a feather. Features: Aerogel insulation combined with a strategic drill / die-cut combo provides a high insulation to weight ratio Bermed Air-loft Thermo side rails Weight shaving lightweight foam Women's specific design: Increased Hip Support, Higher foot insulation Sleeping bag like mummy shape 50D DRS globe trotting durability Sticky - S print 20 x 66 x 1.5in (51 x 168 x 3.8cm) 4 season 25oz (708g)