1. NIGHT WARNING: This chest pack is designed with a large reflective back to make your night running safer.2. Good performance: This is a chest bag for men. Our chest packs are made of high quality waterproof nylon with good flexibility, durability and abrasion resistance.3. Thoughtful Design: 1. This chest bag has three pockets to help you organize your essentials. There are two pockets on the front, the smaller one is for phone and wallet, the larger one is for GPS, paper and documents, tissues. Back pocket for keys, tactical pens and more. 2. In addition, the headphone jack design allows you to listen to music anytime and anywhere during exercise. 3. Durable shoulder straps help relieve shoulder pressure. The back sponge belt quickly absorbs sweat.4. Flexibility: This chest pack has two adjustable nylon straps to fit most body types. Whether you're wearing a thin t-shirt or a thick coat, it can be adjusted to fit your body.5. Occasion: Men's chest bag, the zipper is strong and not easy to break. Perfect for gym, travel, hiking, biking, biking, camping, running and more.