# What is a rash guard?

A rash guard is a tight-fitting athletic shirt worn for no-gi training. It protects against mat burn, reduces skin-to-skin contact, and wicks sweat. Rash guards are required in most no-gi competitions. They come in short and long sleeve versions. Quality varies widely by brand.

**[Read full answer on BJJ Notes](https://www.bjjnotes.app/knowledge-base/what-is-a-rash-guard)**

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**Tags:** gear, no-gi

**Source:** [BJJ Notes Knowledge Base](https://www.bjjnotes.app/knowledge-base/what-is-a-rash-guard)