So Ill's super secure Tyvek Roll-Down Chalk Bucket makes sure you don't make a powdery mess at the climbing gym. It mimics the same roll-top found in dry bags to keep water out, and hook-and-loop tabs secure the bucket's closure even more. So Ill made it out of water-resistant materials that also shed chalk dust, and the fleece lining lets you get the most out of your chalk. The back pocket has a zippered security pocket sized for keys, wallets, and phones.