Cycling backpack, outdoor waterproof bicycle bag, hiking and mountaineering travel portable double shoulder bag, cycling water bladder bag

This cycling backpack is a waterproof outdoor bicycle bag, also suitable as a portable double-shoulder bag for hiking and mountaineering, equipped with a cycling water bladder. The waterproof fabric protects items from rain, and the ergonomic double-shoulder design reduces shoulder pressure during long rides or hikes. The built-in water bladder ensures convenient hydration on the go.