Weighing less than 135g, these lightweight hard caps are made using an EPP (Expanded Polypropylene) impact liner combined with a tough HDPE shell. Both the sweatband and comfort liner have been coated with Polygiene, an anti-bacterial treatment that acts as an internal deodorant to keep the caps smelling pleasant and feeling comfortable. Features and Benefits Moisture-wicking integrated sweatband to allow the quick evaporation of liquids Large reflective panels on the side of the caps add to product and user visibility. Vented for breathability and user comfort Cap covers are suitable for machine washing Pin adjustment for a secure and comfortable fit Standards ANSI/ESD S20.20:2014 BS EN 61340-5-1:2007 Notes Size: 530mm - 640mm