These unisex Trim-To-Fit Yellow insoles from Superfeet are constructed with synthetic material for a great fit. Designed to fit the exact heel-to-toe profile of footwear with an elevated heel such as skates, road cycling shoes and track spikes. Superfeet YELLOW adds fit, comfort and performance to any slim footwear with a raised heel. YELLOW now features a wider forefoot to provide full underfoot coverage. The Diamond Ventingâ„¢ system aligns with the perforated outsoles of hockey skates and road cycling shoes for improved air circulation.