Lightweight, Warm, and Highly Stretchy, This Mock-Neck Base Layer Feels Soft Against the Skin Without Restriction. Dual-fiber oxygen-brushed fabric creates a soft, skin-friendly touch, while a high-stretch knit structure follows the body lightly without feeling tight. The mock neck offers gentle coverage, and the slim fit traces the body's natural lines for a clean look on its own and a smooth, lightweight finish under layers.