There is a reason why original Thinsulate™ insulation is Cabela's No. 1-selling insulation: Warmth without weight or bulk. Thinsulate™ insulation is 1-1/2 to two times warmer than down and other polyester insulations when equal thicknesses are compared. Add in softness, extreme flexibility, and breathability for even greater comfort and you wind up with the premier insulating medium for outdoor sporting wear. Unlike other insulation materials that lose heat-retaining efficiency when wet, Thinsulate™ insulation absorbs less than 1% of its weight in water which means that heat is retained even under soggy conditions. Since its introduction, Thinsulate™ insulation has been effectively used in every sort of outdoor clothing.