Expandable capacity: When the top part of the backpack is rolled up, the dimensions are 31x18x47 cm, about 25 liters. When unfolded, the dimensions are 31x18x52 cm and offer about 30 liters of capacity. There is a zippered pocket and two mesh pockets in the main compartment. An elastic band on the outside secures items such as hats, jackets, and footballs. In addition, two waterproof zippered pockets offer additional storage space.

Multifunctional organizer: This backpack not only has standard side buckles or top buckles for use, but also allows the top part of the backpack to be rolled forward or backward or opened completely to flexibly adjust the capacity and shape.

Excellent safety features: The main body of the backpack is waterproof to prevent rain from entering. It has waterproof zippered pockets on each side for safe storage. The zippered pockets on both sides have reflective strips, with logos and texts in reflective screen printing for better visibility and safe cycling at night. The zippered pocket on the shoulder strap contains a survival whistle with compass for emergencies.

Comfortable vest-like straps: The vest-style shoulder straps integrate a hip belt for balanced, stable carrying, increasing comfort and convenience. The molded, breathable back pad on the back of the backpack provides excellent air circulation and comfort, reducing back pressure and moisture.

Portable and convenient design: An elastic band on the front and a bike light attachment point secure lightweight items or lights while cycling. Webbing hanging loops and hook and loop tape fasteners on the straps make it easy to carry personal items such as water bottles and tools. The bottom right side contains an exhaust valve to release moist air and keep the interior ventilated and dry.