TSL (Thônes Sport Loisir) is a French company founded in 1981 that manufactures high-quality snowshoes for both recreational and professional use.TSL (Thônes Sport Loisir) is a French company founded in 1981 that manufactures high-quality snowshoes for both recreational and professional use. Whether you’re heading out for a relaxed snowshoe trip on a beautiful winter Sunday or a long, demanding trek, you’ll find a suitable model in the TSL range!