Indoor & outdoor use: designed and tested by experienced climbers. Perfect rock climbing chalk bag for outdoor adventures or training inside at your local gym. also great for gym chalk, weight lifting chalk, workout chalk, cross fit chalk and more. Premium materials and craftsmanship: main body constructed from tough, water-resistant materials to withstand abuse and ensure maximum durability. Soft fleece inner lining is gentle on your hands. Chalk up with ease: our climbers' chalk bag has a large chalk bucket and sturdy rim for easy access. Less fumbling for your chalk sock, more focus on the climb! Functional design: built-in drawstring closure closes tight to prevent chalk spills.