The upper part of the men's Riley Top thermal base layer contains a highly breathable material composed of microscopic fibers, which quickly removes moisture, is quick-drying and highly breathable. It also contains silver nanoparticles that reduce odor during use. Riley Top is made from 92% polyester and thanks to 8% elastane is flexible and will not restrict your movement. Stretch and lightweight fabric Silverplus® - antibacterial and odour protection Highly breathable Quick drying Thumbholes Flat seams Print on chest Bluesign® approved fabric - safe for the environment, for workers and for consumers MATERIAL SPECIFICATION: 92% polyester, 8% elastane Model's height: 183 cm Model's weight: 85 kg Model wears: M