Our Journal

Thunder liquid chalk, Kumo powder chalk bag, and Razure skin file laid out on a granite surface

The Complete Guide to Climbing Chalk — Types, Uses, and How to Choose

Most climbers grab chalk without thinking about it. This complete guide covers what chalk is made of, how each format performs, and how to choose and use it for better grip and healthier skin.

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Close-up of chalked hands gripping holds on an indoor climbing woody board

Is Too Much Chalk Bad for Your Climbing?

Over-chalking is one of the most common habits that quietly undermines grip. Here's why less chalk, applied deliberately, almost always outperforms more.

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Climber refilling a chalk bag from a Kumo powder chalk bag on a bouldering mat

How to Choose Climbing Chalk for Your Skin Type

Not all hands are the same — and neither is chalk. Here's how to choose between powder and liquid chalk based on your skin type, and how to adjust when conditions change.

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Multiple Aruta Kumo chalk bags lined up showing topographic packaging design

Does Climbing Chalk Expire or Go Bad?

Chalk doesn't expire, but it does go bad — especially in humid conditions. Here's how to spot degraded chalk and store it properly so it performs session after session.

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Thunder liquid chalk and Kumo chalk bag displayed on a table with a climbing wall in the background

Chalk Bag vs Chalk Ball vs Loose Chalk — Which Should You Use?

Not all chalk formats are equal — especially in humid gyms. Here's how loose chalk, chalk balls, and liquid chalk compare, and which combination works best for climbing in Southeast Asia.

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Climber applying Thunder silica liquid chalk to chalked hands before a climb

How to Use Liquid Chalk Properly for Climbing

Liquid chalk works best as a base layer — but most climbers use too much, don't wait for it to dry, or reach for it at the wrong moment. Here's how to use it properly.

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Climber scooping up a handful of KUMO chalk from packaging

What Is Climbing Chalk Made Of?

Not all climbing chalk is the same. This breakdown covers magnesium carbonate, silica, liquid chalk formulations, and what the differences mean for grip performance and skin care.

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How Often Should You Re-Chalk in Humid Gyms?

How Often Should You Re-Chalk in Humid Gyms?

Not sure how often to re-chalk in humid gyms? Learn how to read your hands and keep friction consistent during indoor climbing sessions.

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Climber looking down at chalk bag in a climbing gym

Why Chalk Stops Working Mid-Session (Especially in Humid Gyms)

When chalk stops working halfway through a session, humidity is often the culprit. Learn why friction drops and what actually helps in humid gyms.

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