Be part of an eco-friendly solution with ODLO's revolutionary Active Warm Base Layer top. Years of expertise in functional technology and sustainability come together in this design: This base layer is made from 100% recycled polyester to reduce the carbon footprint—without compromising on quality and performance. The lightweight, breathable material keeps you warm and prevents unpleasant odors thanks to innovative ZeroScent technology with antimicrobial properties. The top provides the necessary freedom of movement for alpine challenges with ergonomic raglan sleeves, and the snug cuffs fit directly with gloves to eliminate cold spots. Additionally, the Active Warm Base Layer top from ODLO is slim-fitting, making it perfect for wearing under thicker winter clothing of all kinds.