There is a concave-convex bone in the seal of the bag, which can be sealed automatically. It can be sealed tightly and tightly once pressed. It can be opened and closed at any time and can be used repeatedly. It is very convenient. The material is PE, tasteless, used for packaging, storing food ornament, cosmetics, frobnitz, instructions, clothes, etc. It is moisture-proof, waterproof, insect-proof, and prevents things from scattering.