The Odlo Eco Active Baselayer Bottoms have 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.Lightweight baselayer bottomsMade using recycled PET bottlesZeroScent Technology - Minimises unwelcome odoursSeamless design reduces chaffingVentilation zones increases breathabilityOdour-banishing antibacterial silver Functional zones have added insulation to aid in temperature controlFabric: 100% recycled polyester