Atlas Training Blog

A well-fitting rash guard is an important part of Brazilian Jiu-Jitsu training. Unlike a regular athletic shirt, a BJJ rash guard is designed to stay close to the body while you move, grapple, and train. The right fit should feel secure without restricting movement.

Height, weight, body shape, sleeve length, and personal preference can all affect how a rash guard feels. This guide explains what to look for when choosing one.

A BJJ rash guard is a close-fitting training shirt commonly worn during Brazilian Jiu-Jitsu and other grappling sports, especially No-Gi training. It should allow your arms, shoulders, and torso to move naturally while staying in place.

Elite Sports offers rash guards and BJJ gear for different training needs.

A BJJ rash guard should have a close, secure fit, but it should not feel painfully tight. Some compression is normal.

• Stay close to the body
• Allow full movement
• Avoid excessive loose fabric
• Stay in place during grappling
• Feel comfortable throughout training

If the shirt constantly moves, rolls up, or becomes loose, it may be too large. If it restricts breathing or movement, it may be too small.

Short sleeves should sit comfortably around the upper or middle arm without cutting into the skin. Long sleeves should extend toward the wrists without leaving a large gap. Sleeves should remain in place while you grip, frame, push, pull, and reach.

The torso should stay close to your body from the shoulders to the waist without large areas of loose fabric. Try bending, twisting, sitting, and reaching forward. A longer torso can help prevent the shirt from riding up.

Raise your arms overhead, extend them forward, and move them across your body. The fabric should stretch with you without pulling excessively around the shoulders.

Height and weight are useful starting points, but body shape also matters. Men with broader shoulders may need more room around the chest, while slimmer athletes may prefer a closer cut.

Browse BJJ rash guards for men.

A women's rash guard should feel secure without excessive pressure around the chest or waist. Check shoulder comfort, chest coverage, waist fit, torso length, sleeve length, and freedom of movement.

Explore women's BJJ gear.

Children need a rash guard that permits comfortable movement without excessive fabric. Consider height, weight, age, chest measurement, sleeve length, and torso length. Avoid choosing an excessively large size simply to allow for growth.

Browse kids BJJ rash guards.

• Significant loose fabric around the torso
• Sleeves move during training
• The shirt rides up frequently
• Material bunches under the arms
• The waistband does not stay in place

• It restricts your shoulders or arms
• The neckline feels uncomfortable
• The fabric creates excessive pressure
• The sleeves feel too short
• The torso does not provide enough coverage

A tighter compression fit stays firmly in place during intense grappling. A slightly more relaxed athletic fit may be more comfortable for people who do not prefer strong compression. The important thing is that it remains secure and does not interfere with training.

Raise your arms, bend forward, twist from side to side, practice reaching and framing motions, then simulate basic grappling movements such as sitting and bridging. The rash guard should remain comfortable and in place.

Most rash guards use stretchy synthetic materials such as polyester and elastane or spandex blends. Wash after training, follow the manufacturer's care instructions, avoid leaving sweaty gear in a closed bag, and consider air drying to preserve elasticity.

A BJJ rash guard should fit closely while allowing unrestricted movement. Consider your height, weight, body shape, the manufacturer's size chart, and the fit around the shoulders, torso, sleeves, and overall length.

Explore BJJ rash guards from Elite Sports.