PURE is a super fine chalk that uses magnesium carbonate obtained by our own production. It is the simplest and most cost-effective model. By generating from magnesium hydroxide, impurities are suppressed, and excellent magnesium carbonate that is friendly to the environment is used. It is very comfortable to the touch, has little peculiarity, and achieves a high level of sustainability. The Large Pack has a one way valve on the back that allows air to escape for storage, making it easier to fill fingerprint gaps and preventing friction loss by protecting the pack from drying out.   Climbfit: "...Tokyo Powder Industries: PURE. An unbelievably high quality 100% pure chalk that is the base of all the other products that Tokyo Powder produce. It coats your hands beautifully in a thin layer that lasts longer. You use less chalk and get more grip. It’s so smooth it feels like you’re dipping your hands into some sort of liquid, rather than a powder. Super smooth - but not at all slippery... "