SMELL PROOF | Mylar bags have a resealable zip lock closure that traps odors inside when zipped. AIRTIGHT SEAL | Contents inside bag stay fresher for longer. Loud Lock Mylar Bags are waterproof and keep moisture, dirt, and dust out to preserve whatever is being stored. CAPACITY | Loud Lock all black mylar bags hold up to 7 grams, or 1/4 oz, of dry herb. Storage bags are 6.7" x 4" with a 6mil thickness that makes them ultra durable and tear-resistant. Each pack includes 100 individual bags. TRAVEL-FRIENDLY | Fill the mylar bag with snacks or food, tea, powder, medicine, jewelry, electronics, or anything that will fit inside. The zipper will stay closed and the contents will remain undisturbed while on the go. COMPLIANT | Loud Lock 1/4 Mylar Bags are compliant with all state guidelines and regulations.