Stay comfortable in the hotter months with the Rapha Men's Sleeveless Lightweight Base Layer, a lightweight, breathable and sweat-wicking base layer for hot conditions. Key Features: Lightweight material - Works to actively wick sweat away from skin Temperature regulation - Regulates your body temperature in hot and humid conditions Versatile performance - Perfectly matched to a wide range of conditions Comfortable - A soft and comfortable layer under your bibs and jersey prevents chafing when you sweat Wear with lightweight jerseys (under bib straps) in hot weather. Fit: Designed to sit close to the skin and fit under all jerseys in Rapha’s range. Anti-bacterial and wicking treatments applied to the fabric 100% recycled polyester SIZING: (Chest cm)X-Small: 88-94cmSmall: 94-100cmMedium: 100-106cmLarge: 106-112cmX-Large:112-118cmXX-Large: >118cm