After numerous requests from our ambassadors, we designed this one-piece suit for ice climbers, alpinists and skiers who pull on their baselayers and don't take them off until the action ends. The micro-grid fleece interior of our Capilene Thermal Weight provides the greatest warmth combined with the greatest breathability of any baselayer in our lineup. Soft, stretchy and compressible, the Polartec Power Gridfabric has a smooth face that glides beneath layers and a brushed fleece interior to warm your core, wick moisture and feel smooth against your skin. Capilene Thermal Weight is bluesign approved, has 30-100% recycled content and is treated with Polygiene permanent odor control. Features include a high collar and self-fabric hood with anatomical shaping for warmth, a long center-front zipper for venting, a gusseted crotch for mobility, a functional fly, a side-zip drop-bottom, flatlock seams to minimize chafing, and offset shoulder and side seams to lie smoothly beneath pack straps.