Mavics ksyrium pro thermo shoe cover are made from extremely warm primaloftreg sport insulation a lightweight water resistance durable and fast drying loft an innovative closure system allows easy on and off and enables more comfort by keeping the overshoe with the shoe on the pedal extra protection is given by durable water repellent treatment and hypalon reinforcements on the heal and toe primaloftreg sport insulation lightweight multi diametre fibres for susuperior insulation wat