Amazon.com : SKYSPER Small Daypack 20L Hiking Backpack 。?WATER-RESISTANT AND STURDY MATERIAL: SKYSPER 20l Hiking Backpack is made of high-density 600D polyester and 210D nylon plaid fabric, which is impermeable, water-resistant, tear resistant and wear-resistant. All of the backpack\'s stress points and shoulder straps are reinforced with lap-knots to ensure long lasting durability ?ERGONOMIC AND LIGHTWEIGHT: 10.3 x 7.4 x 16.9 inches, 1.1 lbs. The breathable grooved carrying system keeps your back comfortable and relaxed during travel. Breathable mesh on the back fabric can reduce sweating for extra comfort. Our backpacks are designed so that you can lighten the burden on your back during a hiking or a trip. The reflective design also increases visibility, making it safer at night ?UNIQUE APPEARANCE AND SAFETY DESIGN: The small hiking backpack features multiple compartments and an anti-theft zipper to prevent important documents and items from being stolen. The small daypack comes with an outdoor emergency rescue guide providing additional safety information for lovers of the outdoors. The LANTC20 backpack is the perfect combination of function and fashion, with a simple and smooth design featuring yellow webbing on the front panel and contrasting embroidery ?ADJUSTABLE AND REMOVABLE STRAP SYSTEM: The hiking daypack is designed to have convenient trekking pole fixtures. Open front-end plugins can also be adapted to different hiking gear and multi-functional extensions. The 20L backpack also features detachable straps and an