Long run ahead of you? Don't forget the Nike Belted Hydration Pack, an absolute must-have for those long days spent pounding the pavement. No-look wide-mouth bottle sleeve guides 16 oz. bottle in and out of the pack with ease Dual-adjustable padded belt is designed to stay in place and help prevent uncomfortable rubbing and chafing Audio/Nike+ compatible: routes cords to keep them out of your way Reflective pattern for enhanced visibility