Osprey tempest 20 backpackthis tempest 20 backpack is women specific and has been developed for hiking. It has been perfectly designed to cling to your back, whatever the adventure and is extremely lightweight, amazingly versatile, durable and comfortable.exceptional comfortthe seamless lumbar to hip belt body wrap combined with the airscape mesh covered accordion foam back panel aids airflow and provides exceptional comfort. There is also an adjustable torso length for a personalised fit.plenty of storage optionsthere are plenty of storage options with this backpack and it can hold a multitude of items, such as keys, ice axe, trekking pole, helmet, smartphones, snacks, bottles, wet jacket and other hiking essentials. This backpack has a quick access external hydration sleeve with a reservoir hanging loop and is compatible with all of osprey's hydraulicstrade reservoirs.visibility if you are out and about at night, clip an led light to the pack's attachment point for extra visibility. If you get lost there is an emergency whistle on the sternum strap to grab attention.featuresadjustable torso lengthairscape mesh covered accordion foam back panelexternal hydration accessinternal key attachment clipled light attachment pointlidlock bike helmet attachmentseamless lumbar to hip belt body wrapsingle ice axe loopsternum strap with emergency whistlestow on the go trekking pole attachmentstretch front pocketstretch mesh side pockets with insideout compressionstretch pocket on harnesstwin zipped hip belt pocketszipped panel access20l capacitymain dimensions 50cm x 28cm x 27cm lxwxdweight 740gbuy osprey accessories from chain reaction cycles, the world's largest online bike store.