The Camelbak Hydrobak is the official hydration system of the British Orienteering Federation.

This is a great indroduction to the versatility of a back mounted hydration system, with a 15. Litre 'Omega' reservoir, low profile design and short length, which makes it suitable for people with shorter torsos.
Features a 4-point bungee cinch system and comfortable, breathable, mesh straps.