Magic white stuff with Metolius's added secret drying agent. Absolutely guaranteed to make you climb even harder*!
An extra large refillable chalkball - or "chalksock" as it's referred to on the far side of the Pond.
Weight of Chalk: 2oz (c 55g).
NB: The drying agent in this chalk can make your skin quite dry so be sure to use climbing balm or moisturiser after use.
*Maybe!