What Is a Rash Guard & Why You Need One?

A rash guard is a performance base layer made specifically for grappling and combat sports. Unlike regular athletic shirts, it’s built to handle pulling, friction, and mat contact. For lighter sessions, some athletes choose a slightly larger size for a more relaxed fit, but a snug fit is generally recommended for grappling.

• Why wear one?

• Designed for BJJ, MMA, and no-gi grappling

• Protects against mat burn, skin irritation, and scratches

• Reduces friction during grappling exchanges

• Helps limit exposure to bacteria on training surfaces

• Required for most no-gi classes and competitions

Should Rash Guards Be Tight or Loose?

Rash guards are designed to fit close to the body, offering a performance (compression) fit; while some athletes size up for a more relaxed feel during lighter sessions, a snug fit is generally recommended for grappling.

• A tight, second-skin feel for mobility

• Muscle support during intense sessions

• Fabric that won’t get grabbed during exchanges

• A secure fit that stays in place during scrambles

Rash Guard vs Compression Shirt

Although they may appear similar, rash guards are specifically designed for combat sports. While a regular compression shirt can work for general gym training, a true rash guard is engineered to handle the demands of grappling.

• Key differences:

• Reinforced stitching for durability under pulling and friction

• Competition-compliant designs

• Silicone waistbands to prevent riding up

• Constructed for mat training, not just general workouts

No-Gi Training: What Sleeve Length Should You Choose?

Choosing between long-sleeve and short-sleeve rash guards depends on your training style and personal preference. In no-gi classes, rash guards are typically required, while under a gi they’re optional but often worn as a comfortable base layer.

• Long Sleeve Rash Guards

• Often preferred for competition

• Provide additional skin protection

• Help reduce friction on the arms

• Short Sleeve Rash Guards

• Ideal for daily training

• Cooler for warmer environments

• Greater airflow and flexibility

Why Choose Hayabusa Rash Guards?

Designed with performance and durability in mind, each rash guard features:

• Four-way stretch performance fabric

• Moisture-wicking and quick-drying technology

• Flatlock seams for reduced irritation

• Silicone waistband to prevent riding up

• Durable graphics that won’t crack or peel

• Competition-ready construction

Train Like the Pros: UFC Standards

• Hayabusa rash guards meet the demands of elite athletes. Trusted by UFC fighters and professional grapplers, our gear delivers performance, durability, and mobility that stand up to the toughest training and competition. Whether you’re rolling on the mats or preparing for your first tournament, train with the same standard as the pros.

Find the Right Rash Guard for You

The Core, Apex, Pro Ranked, and Fusion series are each designed to target a specific training focus.

• Core Best for beginners and everyday training. Reliable performance, clean design, and comfortable fit.

• Apex Premium fit and construction for serious athletes who train consistently and demand durability.

• Pro Ranked IBJJF-compliant ranked rash guards designed for competition and belt-specific training.

• Fusion Bold designs with a performance training focus — ideal for athletes who want standout style without sacrificing function.

Best Rash Guards By Goal

• Best for Training: Core or Fusion

• Best for Competition: Pro Ranked

• Best for Beginners: Core

• Best for Advanced Athletes: Apex

Rash Guards for Men, Women & Kids

• This collection includes performance rash guards for men, women, and youth athletes. Each design is crafted to provide optimal mobility and comfort, with a range of sizing options to ensure the perfect fit for every athlete.