Updated formulation for 2019! New, eco-friendly chemistry breaks down within 30 days of exposure to the outdoors. Hydrex serves as both a glide and kick wax "booster". Apply thinly over high fluoros, pure fluoros, and kick wax to enhance water repellancy and reduce kick wax icing. Hydrex is also a superb treatment for skin skis to promote glide and reduce icing underfoot. Easy and economical way to get world class glide. Recommended to all racers from juniors to elite racers. 40g pump spray. -4F to 50F.