More spacious than a sleeping bag, the ALTITUDE ATII REGULAR RIGHT ZIP is a down jacket developed by SEA TO SUMMIT to allow women to face the cold in complete serenity during winter bivouacs. It guarantees a comfort temperature of -10C.

Its specific design increases the warmth in particularly sensitive areas such as the feet with THERMOLITE padding. Thegenerous 750+ Loft down padding is of the highest quality and is ultra compact and light. The shape is also designed to offer a little more volume at the hips and is tapered at the shoulders. Theinsulation is optimal and adjustable. It is equipped with a triple slider to switch to kilt mode when it is warmer than expected or, on the contrary, allow to close it almost hermetically with the oversized padding that retains body heat.

The 3D hood also has extra padding, as does the sleeping bag assembly. The padding is held in place to prevent heat loss due to down slipping off the sides.