Introducing the camelbak classic hydration pack this is the quintessential bike hydration pack with the added convenience of an external fill section this means that you can easily refill your reservoir where ever you are without having to take the bladder out camelbak have also included a small elasticated chord structure its located on the front so that when you feel you are starting to over heat you can remove a layer and easily store it with a capacity of 2litres the classic is sure to