A joint adventure with Canadian brand Ciele, the HDcap was developed in partnership using our thermal WTV fabric. Made to keep you covered through those crisp morning and evening rides. Made for cool-weather riding, the HDcap will keep you covered through those crisp morning and evening rides. Featuring 7mesh Wind Thermal Ventilation WTV, an advanced, lightweight loft fabric that dynamically retains or releases heat as your ride. Paired with a woven wind protective outer face fabric, this cosy cap is the perfect winter riding accessory. Small/Medium: 22 1/4" / 56. 5cmLarge/X-Large: 23 5/8" / 60cm