Waterproof/ Breathable

The original warmth without bulk insulation. Inch for inch no insulation keeps you warmer than Thisulate insulation. When you compare equal thicknesses, Thinsulate insulation provides up to twice the warmth of other high-loft insulating materials and nearly one and a half times the warmth of down.
Thinsulate Ultra is 15% more heat retaining compared to Thinsulate, delivering an incredibly warm insulation.