Universal Osprey KESTREL 48 S/M backpack is a universal trekking backpack. Suitable for any terrain or weather. The AirScape™ back panel delivers excellent ventilation in hot weather, while the waist strap provides support and comfort when carrying heavy load. The lid contains two zip pocket, one of which is accessible from the upper back and the second is hidden underneath the lid. If you’re going trekking, you’ll love the Stow-on-the-Go System™ for attaching poles. Simply attach poles with two elastic eyelets. The pack offers a side zip access. It is compatible with a water bladder that can be stored between the back system and a backpack. After you pack the backpack, you can adjust it even more with compression straps.