During the day, the sun is still blazing, the land is still baking, and the air is tingling under the burning sun. Hot summer, restless time, we can't sit still, let's hand in hand to run to nature, rushed into the water. Wading activities, waterproof bag is indispensable. So, how to pick a waterproof bag, which waterproof bag is reliable, but also the brand waterproof bubble reliable, save too much trial and error costs.

1. The overall appearance is beautiful and generous, simple and uncomplicated
2. left and right symmetry, up and down correspondence, welding line uniformity, natural and smooth, no obvious creases, scratches, spills or discretionary burns, no different colors.
3. whether there is any strengthening design for the stressed parts and whether the welding is neat or neat.
4. whether the raw edges and threads are not trimmed.
5. whether the sewing is secure or not
6. whether the backpack is suitable and practical, comfort and practicality.
7. the most critical is what material is used for the main fabric, is it tpu laminated fabric or pvc mesh?
8. verify whether the waterproof performance is reliable, if the waterproof bag labeled as ipx7 waterproof level, then press to the surface of the water for 15-30 minutes, to see if there is no leakage of water immersion phenomenon. If it is labeled as snorkeling grade, then press it into the water for about 2-5 hours to see if there is any leakage or immersion.