PROTECTS UP TO 1/2 OUNCE (15 GRAMS) FLOWER -- Sold in a package of 10, Size 4 Boveda 2-Way Humidity Control is perfect for small medicine containers, small bags and pre-roll tins. Boveda is precise humidity control for herbal medicine, which restores and maintains humidity to create a protective monolayer of water molecules over trichomes, so you can Save the Terps with the original terpene shield. Experience for yourself how much better cannabis is with Boveda. Choose from 58% or 62% RH. -- Boveda 58% RH versus 62% RH for cannabis? It really comes down to personal preference. Try them both side-by-side to see which RH you like better with buds. Or follow these guidelines before buying Boveda for your flower for the first time. -- Start with 58% RH: • If you live in a humid climate • If you prefer drier flower • If you struggle with moldy cannabis • If you're storing flower for personal-use products, such as joints and pre-rolls -- Start with 62% RH: • If you live in a dry climate • If you prefer stickier bud • If you need to control humidity in large herbal storage -- (Just don't mix different RH percentages within the same jar, tin or tote.)