More Details Portable & Adjustable Straps The portable design makes it more comfortable to carry. Additionally, the position of the strap can be adjusted according to the bike frame. Stable and Easy Installation The three Velcro fasteners are strong enough to keep the phone case attached to the bike. Even if you're riding on a bumpy or stony road, the phone case won't move. Inner Classified Design Both sides of the bicycle bag have mesh pockets, which are suitable for conveniently organizing and storing items. The large 1.7 - liter capacity is sufficient for storing bicycle - related items. Reflective LOGO The logo on both sides of the bicycle phone bag is made of light - reflective materials, making night riding safer.