Safe Material These holographic resealable packing bags are made of polyethylene raw material, non-toxic and reliable material, you can put items in them safely. And these bags are 100% odor proof! Resealable Zipper Design The quality is perfect, you can open and close them several times without ever being able to tell any difference, they still look unused. Water-proof & Leak-proof The zipper of our bags are well sealed. Even there is water splash on the surface of the bag, the inside item still remain dry and clean. It can better preserve the freshness of food. Appealing Appearance Our holographic bags are designed with a clear window and when you see through on one side you can see the product that's in them. The holographic back gives it amazing shining, shimmering, splendid color. Looks as beautiful as a real rainbow.