Osprey katari 1.5 hydration packa lightweight and rugged hydration pack that includes ospreys 1.5l hydraulics lt reservoir which is securely housed in an internal hydration sleeve. The pack comes with a durable 210d poly honeycomb construction that protects your gear against impacts and abrasions. The harness is completely adjustable which stabilises the pack and ensures it works with your movements and not against them.featuresincludes the 1.5l hydraulics lt reservoirairscape mesh back panel with central ventilation channelexternal hydration accessinternal hydration sleeveled light attachment pointreflective graphicssternum strap buckle with magnet210d poly honeycomb constructionweighs 0.22kgdimensions 42cm x 20cm x 10cmbuy osprey hydration packs from chain reaction cycles, the world's largest online bike store.