1、The unique headphone jack allows you to conveniently listen to music or answer calls while running, traveling, fishing, hiking, biking, skating, training, exercising, etc. 2、Compact chest bags. When you put lots of accessories inside, the bag will not be bloated. 3、Easily adjusts to fit most body types for a comfortable fit. 4、Breathable back mesh keeps you cool and comfortable. Suitable for outdoor training in all weather conditions. 5、Each chest pack comes with a removable American flag silicone patch. Our chest bag has multiple pockets for the convenience of classifying your gadgets accurately. You can put various goods like phones, headphones, and wallets into the bag while running, jogging, and climbing. Features: The unique headphone jack allows you to conveniently listen to music or answer calls while running, traveling, fishing, hiking, biking, skating, training, exercising, etc. Compact chest bags. When you put lots of accessories inside, the bag will not be bloated. Easily adjusts to fit most body types for a comfortable fit. Breathable back mesh keeps you cool and comfortable. Suitable for outdoor training in all weather conditions. Each chest pack comes with a removable American flag silicone patch. Specifications: Material: Polyester Capacity: 9L Size: 38*26*3cm/ 15*10.2*1.2in Weight: 272g/ 9.6oz Package list: 1 * chest bag 1 * chest bag