The Nathan Trail Mix Plus hydration belt will become an essential accessory for your mid-distance runs with two 10 ounce flasks that feature push-pull caps. Its lightweight and super flexible to make your run as efficient as possible. The ergo-shaped, soft monofilament belt offers multi-directional stretch that eliminates bounce and maximizes comfort. Large zip pocket is big enough to store up to the iPhone 6 Plus. Shock cords feature one-pull tension locks for extra capacity. SpeedFit™ holsters ensure quick, one-handed access. Hand-wash only. BPA- and PVC-free.