Refill and clean the antidote reservoir with complete ease ideal for those who often like to get out features easy to use reservoir the antidote reservoir is easy to fill and easy to clean big bite valve allows for easy access to water store pureflow tube keeps water tasting fresh secure and adjustable fit sternum strap and removable belt to alter the fit multiple pockets media pocket b ike tool organizer pocket and s tash pocket for easy access four point compression stretch h