The Hydrapack Shape-Shift™ Reservoir 3.75 Litre is a heavy-duty, military-grade hydration solution compatible with Kriega TRAIL 9 and TRAIL 18 Adventure Backpacks. Designed for the harshest environments, it features a durable 0.4mm thick Thermo Polyurethane (TPU) reservoir, offering twice the standard thickness for exceptional resilience. Easy to clean and dry, it's fully reversible with a Wide Slide-Seal™ top for effortless filling and a secure, leak-proof closure. The insulated Hydrofusion™ drink tube maintains water temperature, ensuring your drink stays cooler for longer.

With an ergonomically designed Surge™ Bite Valve, it provides a natural drinking experience with a convenient twist on/off function and protective cover. The Plug-N-Play™ connect system allows for quick disconnection of the drink tube, featuring an auto-shutoff valve to prevent leaks, enabling easy reservoir removal for refilling while keeping the drink tube in place. This system is built to keep you hydrated and on the move, no matter the adventure.