Built with Kevlar®. Weight you can wear. The easiest way to add an extra challenge to any workout, our weighted vest straps on easily with Velcro® straps and handles everything you throw at it with premium, durable Kevlar® that's made to last. Use is for whatever moves you—squats, jumps, pullups, weekend hikes, and even runs. Unique cross-strap design stays put and keeps you hands-free. One size fits most.