Siroko Core Aletsch Bottom

The Siroko Core Aletsch Bottom leggings are thermal, breathable baselayer leggings designed to lock in body heat while helping prevent overheating. Their lightweight construction, flat seams and second-skin feel provide comfortable freedom of movement with reduced chafing.

Built for active days outdoors, they suit runners, cyclists, hikers and skiers who need dependable warmth and moisture management beneath their outer layers. The streamlined design keeps comfort focused on performance from start to finish.