Training Shoe Support: The Nike Free Metcon 4 is a training shoe that combines flexibility and support so you easily transition from weight lifting to speed drills. Perfect For: Weightlifting, bootcamp, HIIT workouts, sprints, and intense gym workouts. Made to easily transition between different activities. VIP 90-Day Perfect Fit Promise: VIP Family members can try out the Nike Metcon Free 4 risk-free! Crush all your workouts in your Free Metcon 4 and if you don't love them, you have 90 days to exchange them. Easy! TRAINING SHOE TECHNOLOGY: Ventilated Mesh Upper: "Chain link" mesh upper cools and flexes as you speed through agility drills. Sculpted Topline: Keep ankles supported with a thoughtfully-designed topline that's irritation-free. Targeted Flexibility and Rigidity: An upper with zonal functionality gives you the forefoot flexibility you need for agile m