Carbon negative climbing chalk

Every bag is a
small piece of
captured pollution.

Pure MgCO₃, mineralised from atmospheric CO₂. Traceable. Carbon negative, not offset.

climb8 100g carbon negative climbing chalk bag

Pure climbing chalk. Nothing else.

One ingredient. No fillers, no drying agents, no fragrance. Every batch traces back to a CO₂ mineralisation process. The only chalk on the UK market that removes more carbon than it emits.

CompoundMagnesium Carbonate (MgCO₃)

Purity99.4%

Net carbon−0.82 kg CO₂e per 200g

OriginPacked in the UK

FormatLoose chalk, 100g and 200g

How carbon-negative chalk works.

Developed in partnership with

Capture

Atmospheric CO₂ is captured and mineralised into magnesium carbonate, locking the carbon permanently into the crystal structure.

Verify

Every batch is independently tested for purity (≥99%) and carbon balance. Full CoA and SDS documentation available per lot.

Climb

The chalk performs like any premium MgCO₃. The difference is what it took from the atmosphere to make it. Every bag is a small piece of captured pollution.

Every bag is asmall piece ofcaptured pollution.