Floating air exchange system has been applied into the general design of this 50L Universal Type Double-shoulder Nylon Outdoor Camping Hiking Backpack， making it more effective to fit users’ vertebral curve and meanwhile keep a certain gap for dissipating heat. This backpack， due to its premium polyester and nylon materials， is wear-resistant for long-term wearing. Its double-shoulder design makes it comfortable to wear. Also， it features well-ventilated and breathable advantages. Buy one for your daily outdoor activities!                                    Features            New and high qualityMade of highly great nylon and polyester materials， no irritation to your tender skinLarge capacity of 50L could tolerate plentiful daily necessitiesLightweight and durableDouble-shoulder backpack， more comfortable to wearAdoption of floating air exchange system， great to make it fit for your vertebral curve and keep a certain gap for heat dissipationIt is much suitable for camping， hiking， mountaineering and other outdoor activities                                                            Specifications            Condition    New    <br>Material    Nylon &amp; Polyester    <br>Volume    50L    <br>Color    Red    <br>Dimensions    (24.8 x 13.78 x 4.72)" / (63 x 35 x 12)cm (L x W x H)    <br>Weight    53.97oz / 1530g    <br>                                                            Package Includes            1 x Camping Hiking Backpack Bag