OstroVit Chalk Block is nothing more than magnesia in a cube. A product that will improve your grip. All you need is to crush the necessary amount into smaller portions and rub your hands with it to significantly improve the grip during heavy training sessions on poles, handrails or gym. This form of pressed magnesia does not spray, which is its great advantage.

OstroVit Premium Liquid Chalk is nothing more than liquid magnesia, this time in a handy smaller version with a key ring. A product that will improve your grip. One or two drops are enough to significantly improve your grip during tough training sessions on on poles, handrails or gym.