Thin Air Climbing Chalk - Made Out of Thin Air Thin Air is climbing chalk with a story behind it. Made in Scotland by a startup on a mission to reduce the impact of minerals globally, it is created using a process unlike any other climbing chalk. We fuse CO₂ with magnesium compounds to make high-purity magnesium carbonate from minerals and carbon dioxide. The result is a premium chalk that permanently locks away CO₂ while delivering the same feel, dryness, and grip climbers expect from high-performance climbing chalk. At 99% magnesium carbonate purity, Thin Air has been designed to perform exactly like premium climbing chalk — clean, consistent, and reliable from warm-ups to crux moves. The difference is how it is made. No other climbing chalk is made using our process. By turning CO₂ into a useful mineral product, Thin Air helps show what the future of lower-impact minerals can look like. Why climbers choose Thin Air Made from CO₂ — created by fusing carbon dioxide with magnesium compounds Permanently locks away CO₂ — carbon is turned into stable magnesium carbonate Made in Scotland — developed by a purpose-led minerals startup Unique process — no other climbing chalk is made this way Premium performance — designed to feel and perform like leading climbing chalks Very high purity — 99% magnesium carbonate for dry, dependable grip Climb with premium chalk made from CO₂.Grip hard. Leave less behind. We are now inviting our first customers to pre-order our product. We are currently building our production and just building up production using plant based CO2. Please expect your order to arrive within 3 weeks. Key Features 99% magnesium carbonate (MgCO₃) Excellent moisture absorption Consistent texture for dependable grip Ideal for bouldering, sport climbing, and training Produced using plant-derived CO₂ — a first for climbing chalk