The Boulder Chalk Bag from Mammut ensures you always have enough chalk on hand. This large chalk bag is perfect for bouldering. It can be set up indoors or outdoors on the rock, providing quick and easy access to the white gold. The roll closure allows the main compartment to be sealed dust-tight. Additionally, extra storage space has been considered; a dust-protected zip pocket is available for sensitive items like your phone or camera. Other small items such as a brush or tape can be conveniently stored in a mesh pocket.