Worn for the duration of your climb or expedition, the SATURN SUIT avoids the typical problems of gap-osis and doubled layers inherent with separate mid-layer tops and bottoms. Farmer John design keeps shoulders warm and pads under pack straps. Vest top sports two zippered stash pockets and can also be unzipped and rolled down in fair weather. A total of 3 zipper tabs provide vent options and give instant access for elimination. 150-weight Polartec Power Stretch moves with you, is highly breathable and when covered up is extremely warm. Shin to hem is thinner Motion Fleece for wear inside boots or shortening legs as desired.