NIKE Double Flask Belt 20 oz 600 ml Unisex Black/Hyper Pink/Silver The Nike Double Pocket Flask Belt 20 oz offers a comfortable option for hydration on the go. Two lightweight 10oz flasks fit securely into stretchy mesh pockets on a form-fitting belt. Benefits Stabalized design reduces bouncing as you work out Two 10oz ergonomic flasks are lightweight and comfortable to hold Form-fitting belt curves to your body Secure zip pocket Reflective swoosh Contents: Body: 62% polyester, 38% nylon;