Clean, fresh drinking water is essential to human and other life. To function properly, the body requires between one and seven liters of water per day to avoid dehydration; the precise amount depends on the level of activity, temperature, humidity, and other factors. In recreation and other sustained outdoor activities, a hydration system is intended to promote its user's drinking enough liquid to support the physical effort involved in the activity.
Hydration systems are flexible bladders filled with water connected to a hose to drink from. A basic hydration system is in a protective fabric shell, so that the bladder is unlikely to be damaged by other gear that it shares with the interior of an ordinary pack. Hydration systems are refillable; most hydration systems are refilled by the unscrewing of a cap. Hydration systems also feature a bite valve which helps start and stop the flow of liquid through the hose with minimum effort. Hydration systems are ideal items for outdoor activities to keep hydrated. Many of our hydration systems are compatible with brands such as Venturer, Blackhawk and Camelback systems.
A "hydration-system compatible" backpack is a pack that will usually feature a hole through the pack, near the upper anchoring point of the pack's shoulder straps, sized for the hose and bite valve to pass through it, and often covered by a flap that prevents rain entering the pack through it. As part of an integrated design, incorporating both a backpack and the hydration system (usually sold together as a hydration pack), usually with at least a few pockets-worth of storage space for other items. Such a combination is likely to have a channel inside one or both shoulder straps, for the hose to pass through, preventing the hose from tangling with other gear or the environment, and ameliorating the annoyance of the liquid warming up while waiting in the hose to be drunk next, or the problem of it freezing.
Hydration packs are also referred to as a military hydration pack, hydration carrier pack, hydration carrier, US military hydration pack, water pack, travelers pack, water gear pack, water day pack, Army hydration pack, H20 hydration pack, camelback hydration packs, backpack hydration systems, tactical hydration packs, bike hydration systems, discount hydration packs, running hydration packs, emergency preparedness, emergency safety, emergency survival, and hydration packs for runners.
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