Inateck Men’s Bicycle Backpack with RollTop, 30-35L, Waterproof, Multifunctional Organiser with Removable Shoulder Strap, Outlet Valve, Waterproof Zip for Cycling/Hiking/Outdoor

Specification

Expandable capacity: The dimensions of the backpack with rolled top are 29.00 cm x 18.50 cm x 55.00 cm (30 L). Maximum size under expansion 29.00 cm x 18.50 cm x 62.5 cm (35L). Enough space for all daily necessities.
Multi-function organiser. Inside the main bag there are two mesh pockets for items such as keys and USB cable. The mesh pocket with drawstring on the left side can hold a water bottle or umbrella. The elastic strap on the front helps to attach items such as hat, jacket and football. A waterproof zip pocket on the front provides additional storage space.
Water-resistant: The backpack and zips are made of waterproof material and effectively protect your belongings from rain.
Three ways to carry: The backpack can be attached to the saddle of a bicycle, and the buckles on both sides lock the rolled top. You can adjust the chest straps to reduce pressure when you wear the backpack over your shoulders. With the handles, the backpack can also be used as a carry bag.
Ingenious design: The backpack features a 3D recessed design, which improves air circulation and heat dissipation. A valve on the left side can deflate the air inwards to keep the backpack flat.