1. Universal zipper and multi interlayer design multi-functional meet your needs.
2. You can put mobile phone coins keys card money in the bag.
3. EVA + neoprene material waterproof shockproof and impact resistant.
4. Elastic telescopic arm strap fits for 22-34cm arm circumference.
5. Used for various activities such as running biking working out hiking etc.
6. Size: 18*10*2.5cm
7. Weight: about 100g