CHABY Underwear

Designed for women participating in mountain activities in cold weather, the AULP 1ST LAYER F is a technical base layer that combines lightness, breathability, and stretch. It is designed for skiers, hikers, and outdoor enthusiasts looking for a technical base layer capable of actively regulating body temperature during intense physical activity. Its stretchy fabric provides freedom of movement without restricting your range of motion, no matter how intense the activity.

The 1ST LAYER F AULP: a base layer designed for the mountains

As a base layer, this women’s technical base layer serves a specific purpose: to maintain a stable level of thermal comfort between the skin and outer layers. Its thermal regulation keeps you warm even during sustained exertion, without generating excessive heat that would become uncomfortable when at rest. It is this balance—often difficult to achieve in the mountains—that this garment aims to maintain.

Lightweight and Breathable for Comfort on the Move

The lightweight construction of the 1ST LAYER F minimizes the sensation of wearing it, which is particularly appreciated during long ski or hiking trips. The fabric’s breathability helps wick away heat and moisture generated by exertion, preventing that damp, clammy feeling of a wet garment clinging to the skin. Stretching in all directions, it moves with you without friction or resistance, making it a base layer suitable for both winter sports and hiking across varied terrain.

A technical garment for cold conditions

The 1ST LAYER F is specifically designed to be worn in cold weather, in winter or high-mountain conditions. It forms the foundation of an effective layering system, to be paired with mid-layers and protective jackets depending on the intensity of the activity and the weather conditions encountered. Available in the AO WILD FLORA colorway and in sizes S through 2XL, it fits a wide range of body types.