Part of Osprey\'s new collection for 2017, the Stratos 34 is perfect for those looking for a ventilated day pack with enough space for extra layers and equipment for hikes in changeable weather as well as camping equipment and overnight gear for those who want to stay in the wilderness a little longer. The fully adjustable AirSpeed™ ventilated back system with breathable suspended mesh provides comfort in warmer climates, even when the pack is full. A durable, detachable raincover helps to keep the contents of the pack dry should the weather take a turn for the worse. Stratos 34 is equipped with a large panel opening, an easy access pocket on the top and a large, vertically zipped expansion pocket on the front which is ideal for storing a jacket or spare layer. The Stratos 34 is compatible with all Hydraulics™ and Hydraulics LT™ reservoirs, so you won\'t need to keep stopping to rehydrate.