1、Made from breathable mesh back with pads and water-resistant nylon fabric, comfortable and durable. 2、Small, slim and ultra-light. Perfectly snug to your body without impeding your pace or disturbing your endurance, no bounce or rubbing. 3、Highly Reflective in low light to improve road safety. Ideal for middle distance routes (5-15 miles) night running, walking, hiking, biking, motocross, and other outdoor activities. 4、Multi-pockets on back and sholder straps to carry cellphone, tablets under 8.5”, car keys, ID cards, MP3 and more essentials. 5、Adjustable shoulder straps make the backpack one size fit all. Perfect gift for men, women, and kids ages 9 and up who like exercises! 1x Backpack  Product Name: Sports Backpack Applicable scenes: cycling, running, mountain climbing, fitness and other sports Fabric: Oxford cloth Reflective, adjustable shoulder strap