NylonMade inor ImportedWater resistant, Lightweight, Breathable, Strong, Sturdy, DurableDURABLE WATER RESISTANT MATERIALS - Our unisex sling backpack is made of high-quality nylon and meshes fabric(back), durable, strong, sturdy, comfortable, soft and machine washable, water repellent and tear-resistant, rest assured your belongings are dry and fresh even in rainy days. Featured with delicate workmanship, bringing you excellent using experience.HIGH CAPACITY WITH SMALL SIZE AND MANY PRACTICAL POCKETS - SMALL: 13.3x7.8x3.5 inches and LARGE: 15x9.8x4 sling backpack, offering large capacity for your needs. Our multipurpose casual daypacks come with many practical pockets - 1 main compartment is built in an iPad sandwich pocket, 1 Front Zipper Pocket comes with 2 interior slot pockets, and 1 Strap Pocket for your important items. 1 Side Pocket for umbrella and water bottle, etc.PADDED BREATHABLE COMFORTABLE ADJUSTABLE STRAPS BACK - Theof chest crossbody backpack is padded with breathable comfortable materials, full of ventilated holes on all theof the sling bag, which make you no burden when carrying. The breathable comfortablesystem, sweat-free fatigue. The breathable mesh straps, strengthened with strong and sturdy stitching for durable use, are padded with thick foam, providing a fresh comfortable carrying experience for your shoulders.PACKABLE LIGHTWEIGHT - Our small sling backpack bag with a water bottle holder can be folded into a small size and expanded to a large backpack. Lightweight(0.55lb) and portable, great for the gym, and traveling. UPGRADED DESIGN - Compared with other ordinary oversized sling bags, our chest bag adopts an upgraded design: reinforced strap,strap zipper, strap pocket, and water bottle holder, multiple organizations andworkmanship make it yourchoice.MULTIPLE PURPOSES - Our travel hiking day packs are great for multiple purposes, like daily use, mommy bag, shopping, walking a dog, gym, biking, short hike, a day at the amusement park or going to the gym. And use this daypack as a carry-on for hiking, travel, camping, fishing, mountaineering, backpacking, climbing, etc.