Designed to keep your temperature under control during the winter season. The Odlo Eco Active Baselayer Top has increased breathability with ventilation zones, whilst brushed inside fabric gives you great insulation. Antibacterial silver protects the baselayer from nasty odours forming so you\'ll stay fresh.Winter baselayer bottomsHalf zipSeamless design reduces chaffingVentilation zones increases breathabilityOdour-banishing antibacterial silverFunctional zones have added insulation to aid in temperature controlFabric: 100% recycled polyester / insert 94% recycled polyester, 6% elastane