Hydro-Head Mylar bags are made of the highest quality materials. Mylar bags are a great smell proof alternative to pop top vials as they are more versatile. These bags can be used for dry herb, concentrates, or edibles! Available in nine sizes; pre-roll, 1 gram, 1/8 ounce, 1/4 ounce, 1/2 ounce, 1oz, 1/4lb, 1/2lb and 1lb. Dispensary Supply Mylar bags are a must have product for all medical or retail dispensaries.