Drinking regularly whilst exercising will keep you fit for longer. The Deuter hydration systems with their “Helix Valve“ enable a constant flow of liquid without interrupting the flow of your sports. Top performing hydration systems in 3 sizes, with competent hydration technology from Source Vagabond. Tast-Free bladder: The special film with inner surface as smooth as glass, keeps water for days and even weeks without changing taste. Due to the special molecular properties of the bladder, this system is very hygienic, easy to keep clean. Taste-Free tube: The special co-extruded tube has a glass smooth inner surface without any taste. Streamer Clip: Full width top opening for easy filling and cleaning. Easy to use sliding clip. Absolutely leak-proof.