【THICK AND DURABLE MATERIAL】- The SKYSPER hiking backpack is made of water-resistant, impermeable, tear-resistant, abrasion-resistant 600D polyester and 210D nylon plaid fabric. Plus, we've reinforced all parts of the bag and shoulder straps with premium SBS zippers to make the day pack more durable. 【DAY TRIP BACKPACK】 - The 25L capacity of the hiking daypack can meet daily needs, whether that be daily commuting, suburban 1-2 day trips, short-distance hiking. Our hiking backpacks feature a multi-compartment design, including a main compartment for holding hydration packs(water bladder not included), an anti-theft safety compartment with a handy key hook, a front pocket and 2 large mesh side pockets. 【ERGONOMICS AND CONVENIENCE】- The hiking back pack is designed with a multi-slot breathable high elastic back panel to reduce the fatigue of hiking. In addition, the single side trekking pole buttons and external webbing enhance the carrying capacity of the 25L backpack. The detachable waist belt can adapt to numerous scenarios. The adjustable chest straps and detachable straps includes a safety whistle to keep you safe while backcountry trekking.