The Adv Skin 5 Set has a total capacity of 5 liters. It keeps two 500 ml bottles right where you need them, and allows for other essentials to be carried, too. hone, energy gels, keys, a windbreaker, etc. are carried snugly around your body, with minimal shaking, rolling and rattling. The main image displays the colour youre about to add to the shopping cart. Images with the model showing details, may display another colour. - Two bottle pockets and two bottles included - The bottles flatten as you drink --> no air pockets, no sloshing - Min. weight does not include the bottles - One bottle pocket has a small zipper pocket - SensiFit structure for a great, shake-free fit - Main compartment for gels, a windbreaker etc. Choose the size according to your chest circumference: - 80-85 cm: XXS - 85-91 cm: XS - 91-97 cm: S - 97-103 cm: M - 103-109 cm: L - 109-118 cm: XL