Naturehike 55 5L Trekking Backpack is in perfect capacity for multi day backpacking trips. 

Second-generation CR lightweight comfortable bear technology:

• Light aluminum bracket reduce 50% weight than the traditional aluminum bar, increase by 30% on intensity.
• The back plate with mesh design better increase the back of the breath;
• Upgraded 3D ventilation of shoulder strap make user feel very comfortable,
• The design of the waist-care part is wider than the first generation;
• The waist middle divider allows the user to easily tighten the backpack, thus make the entire weight applied to the crotch portion.