5 1 1 is a famous backpack company in the United States, which mainly includes rush 12 rush24 rush72 backpacks, which can provide soldiers with 12 24 72 hours of survival needs respectively. Their backpacks are quite popular with American soldiers and spread all over the world. Where there is this backpack, there are soldiers. This backpack is of good quality. The shoulder strap of the fake backpack is wide and thin. After measurement, the width of the fake shoulder strap reaches 7.8 cm, while the real shoulder strap is only 6.2 cm, and the thickness of the fake shoulder strap is only 1/2 of the real shoulder strap. Therefore, fake goods do not combine human mechanics, which will cause neck sticking, and long-term carrying will hurt the spine.