Petzl Power Cruch is 100% Magnesium Carbonate climbing chalk available in two sizes of pack. 100g will fill up a regular chalk bag and 200g can be used for refills. Power Crunch is 100% chalk without any added drying agent so improves grip without totally destroying your hands.

Petzl Power Crunch Features

• Improves grip for better climbing performance
• Comes as loose chalk