Backpack materials to diversify, plastic material, polyester, canvas, nylon, cotton and linen materials such as bags. In the era of more and more individuality, various styles such as simplicity, retro and cartoon also cater to the needs of fashion people to publicize their individuality from different aspects. So what are the types of backpacks? How to choose?
According to the number of people

When hiking alone, you can choose a backpack of about 25 ~ 35 liters. Holiday travel with family and children, from the perspective of taking care of the family, need to choose about 40 liters of backpack, external hanging system should be more, convenient to help family carry umbrellas, cameras, food and other items.

According to gender

Because of the size and load-bearing capacity of men and women, the choice of outdoor backpack is not quite the same. Generally one or two days of short outing, men and women can use about 30 liters of backpack. For a long distance trip or camping trip lasting more than two to three days, a backpack of 45 to 70 liters or larger is generally chosen, while men choose around 55 liters and women choose 45 liters.

According to the itinerary

Day trip, cycling, hiking activities, choose a backpack less than 30 liters. Two to three days of camping can choose 30-40 liters of multi-functional backpack, more than four days of hiking, to place tents, sleeping bags, waterproof MATS and other outdoor equipment, can choose more than 45 liters of backpack. In addition, the general field activities and the backpack used to climb the mountain is different, the backpack used for mountaineering does not have many parts, like mountaineering friends need to pay attention to.

According to the length

Before choosing a backpack, first of all, you need to measure your posterior upper body length, that is, the distance between the cervical protrusion and the posterior lumbar spine. If the torso length is less than 45 cm, you should buy a smaller bag. If the torso length is between 45 and 52 cm, you should choose a medium bag. If your torso is more than 52 centimeters long, you should choose a large bag.