Features: Multiple Storage Compartments Fully equipped with multiple organized compartments to significantly expand your storage space. Ultra-Lightweight & Versatile Weighing only about 290g, its lightweight design is perfect for various outdoor activities like hiking, trail running, and cycling. External Trekking Pole Attachments Features a quick and easy external attachment system for your trekking poles, offering effortless access on the go. Breathable Back Panel With Mesh The ventilated mesh back panel effectively wicks away sweat and moisture, keeping you cool and dry. Reflective Details for Night Safety Integrated reflective elements enhance your visibility and safety during early morning or night-time adventures. Hydration-Compatible Main Compartment The main compartment features a dedicated hydration tube port, allowing you to drink easily without opening your pack. Specification: Brand: BISINNA Fabric: 90% nylon, 10% spandex Mesh Fabric: Polyester fiber Size: 40*30*8cm Weight: about 290g Model No.: B49 Capacity: 6L *Note: There may be some error due to manual measurement and different ambient light, please subject to the real object. Packing List: Backpack x1