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Prevents slipping of backpacks, daybags, backpacks, etc. Prevents the backpack from falling off and reduces burden. Recommended for children with small shoulders or women on the shoulder, and for those who are concerned about the backpack falling off. Balance Stability: When you carry the pack, you can use this chest strap to achieve a better balance and stability. Durable nylon material; Uses nylon material and anti-slip buttons to keep it firmly in place. It will not slide or fall off even when you perform the most intense workouts. It is easy to use and suitable for elementary school students. Comes with a one-touch removable buckle that makes it easy to put on and take off. The length of the band can be easily adjusted; Stops the backpack from swinging around. The backpack is not only tired from heavy backpacks. When you walk the backpack swings back like a pendulum back and forth left and right, which will interfere with your walking force, and it is burden on your body. The chest strap is the perfect way to stop such sways. The backpack can be firmly attached to your body, so it looks like a part of your body, and you can feel obviously reduced burden. "