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Critical Swim Speed (CSS): Know your optimal training pace
ensuring a comfortable and secure fit during your high-intensity workouts
a molded heel collar ensures a more secure and improved heel fit
it’s your ultimate trail companion
it offers unmatched comfort with every step
Men's Cloudflow 5 themachg-callmetarmacdaddy Critical Swim Speed (CSS): KnowON Cloudflow 5 The ultimate training shoe for fast paced intervals. Built with Helion HF hyper foam and a nylon blend Speedboard, it delivers exceptional energy return and propulsion. A dual layer of Helion HF maximizes rebound, while the glass fiber nylon blend Speedboard ensures a powerful, responsive ride. The engineered woven mesh upper is breathable and ultralight, offering superior comfort during intense sessions. Inspired by race winning super
