Fairtex rashguards are designed as compression-fit MMA, BJJ and grappling base layers — the cut sits tight to the body so it doesn't shift under a gi or fight shorts. Sizes XS through 3XL are unisex. Pick by chest circumference; the rest of the measurements are reference points for length and reach.
Fairtex Rashguard Size Chart (RG8 Short Sleeve, RG9 Long Sleeve)
Flat-garment measurements in inches. Chest is the half-chest × 2 (full circumference). Sleeve length is measured from the centre back of the neck along the shoulder and down the arm.
| Size | Neck (in) | Chest (in) | Sleeve (in) | Bicep (in) | Length (in) | Hem (in) |
|---|---|---|---|---|---|---|
| XS | 15.6 | 33.9 | 24 | 6.3 | 23.2 | 30.7 |
| S | 16.5 | 35 | 24.8 | 6.3 | 24.4 | 32.7 |
| M | 17.3 | 36.2 | 26.8 | 6.5 | 25.6 | 34.4 |
| L | 18.3 | 37.8 | 27.2 | 6.9 | 26.8 | 36.2 |
| XL | 19.1 | 39 | 27.6 | 7.3 | 28 | 38.2 |
| 2XL | 20.1 | 40.2 | 28 | 7.9 | 28 | 39.2 |
| 3XL | 21.1 | 41.3 | 28.3 | 8.3 | 29.1 | 41.1 |
How to measure
- Chest: measure around the fullest part of your chest, tape level under the arms.
- Sleeve length: measure from the centre back of your neck, across the shoulder and down to your wrist.
- Length: from the high point of the shoulder seam to the hem.
Fit notes
- Rashguards are designed for compression fit — they should feel close to the skin without restricting movement. If you're between two sizes, the smaller size delivers the support a rashguard is built for; size up only if you want a looser, t-shirt-style wear.
- The fabric is anti-bacterial Nylon/Spandex with quick-dry properties — it stretches with your range of motion and recovers shape after washing.
- RG8 short sleeve and RG9 long sleeve use the same body measurements; only sleeve length and total length differ between cuts.
For more no-gi and grappling apparel, see the full Fairtex collection — matching fight shorts, MMA gloves and BJJ gear share consistent sizing.
Fairtex RG9 Long Sleeve Rash Guard Black
Designed for fighters who live on the mats, the Fairtex RG9 Long Sleeve Rash Guard in Black is a full-arm compression layer built for long, sweaty grappling rounds. Crafted from a polyester and spandex blend, this rash guard moves moisture fast, dries quickly, and stretches through every scramble and transition.
The full-length sleeves protect your forearms from mat burn during ground exchanges, while the compressive cut hugs the torso and stays put under a Gi or fight tee.
Main Features:
- Polyester and spandex construction for stretch and rapid drying
- Full-length sleeves that defend forearms from mat burn
- Flatlock seams that lay flat against the skin to prevent chafing
- Handmade in Thailand for authentic craftsmanship
- Compressive fit that doesn't bunch under a Gi or no-Gi top
Browse more in our Fairtex collection or explore the wider rash guard range.
Manufactured by: Fairtex
Product Type: Rashguards
Gender: Unisex
Material: Polyester/Spandex
Origin: Thailand
£4.99 FREE - Spend over £75 (*Mainland UK only) - Delivered within 3 working days - Estimated delivery date provided at checkout - Tracking number available once shipped
£9.99 - Delivered next working day - Estimated delivery date provided at checkout - Tracking number available once shipped - Subject to order cut off times. *Order before 12pm.
£23.99 - Delivered within 4 working days - Estimated delivery date provided at checkout - Tracking number available once shipped - Destinations include Northern Ireland, Scottish Highlands and Channel Islands.
from £20 - For orders over 100cm in length or 30kg in weight. - Oversized items are not eligible for free delivery - Total cost calculated at checkout. Please check dimensions and weight are suitable before completing your order to save any unexpected returns costs.
Easy Returns available on all UK mainland orders via our returns centre - Please complete the returns form in full and send your order back to us via your selected method. - Returns will be processed within 7-14 days of receipt - If your order is oversized please contact us to arrange an alternative returns method. For more information view our returns policy.
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