Take a look:
1. Whether the backpack is full in shape, whether the curves are natural, whether the pasting is smooth, whether the corners are symmetrical, whether the fabric has obvious defects, and whether it is clean and tidy.
2. Are there any empty stitches, missing stitches, or skipped stitches in the stitching.
3. Does the label indicate the manufacturer's name, address, and materials used in the product.
Trial:
1. Check if the zipper closes smoothly.
2. Check if the handle and straps are securely sewn (you can use your hand to pull slightly).
3. Can you grip it comfortably.
4. The support area on the back of the backpack should have a soft and elastic cushioning treatment, and there should be no sharp corners where pressure is concentrated when carrying it.
5. The backpack strap should not pinch the neck of the backpacker.
6. The length of the backpack strap should be flexibly adjustable and securely locked.
It should be noted that the plastic and metal accessories installed on the backpack should have no sharp tips or burrs on the surface to avoid damaging the human body or hooking clothes during use.
