Features the 'First Wave' (military spec.) reservoirs are designed for extreme environments. 0.4mm thick Thermo Polyurethane (TPU) is twice the thickness of the standard consumer model. Fully reversible for easy cleaning / drying. A Wide Slide-Seal top makes it easy to fill and creates a leak-proof seal. The Hydrofusion tube is durable and lightweight with built-in foam insulation. Breakthrough tube helps keep your water cooler in even the hottest temps. Surge Bite Valve naturally ergonomic design with twist on/off function and protective cover. Plug-N-Play connect system lets you easily disconnect the drink tube (an auto shutoff valve prevents leaking) and remove the reservoir from your pack for convenient refilling while leaving the drink tube in position TECH-SPECS 3-liter (100 oz) capacity Reversible for easy clean/dry Wide fill (sliding seal) Plug-N-Play (dry-break) Insulated drink-tube Hook and loop tab - drink tube management FDA approved polyurethane LIFETIME warranty WEIGHT: 200 Grams Compatible with all Kriega backpacks