material: aluminium foil.
10*15cm white aluminum foil flat bag-200pcs/pack aluminizing mylar cookie/candy packing pouch heat open sealable ping pocket using: packing food, tea, gift, herbs, powder, liquids, electronics component, hardware, nuts, coffee beans, dried fruits, groceries, ornaments, house hold, facial mask, medicine grain etc.in stock size: 10*15, 9*13, 8*12, 7*10, can customize.