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Rash Guards

RDX T15 Long Sleeve Black Rash Guard

  • Budget
  • Beginner
  • General training
  • Sparring
  • Grappling

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Product details checked against available sources.

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Specifications

Sleeve lengthLong sleeve
Fabric composition83% polyester, 17% spandex
FitCompression
Waist retentionNot confirmed
Ranked coloursNot sold as a ranked range
Available sizesS, M, L, XL, 2XL, 3XL
Fit notesNot confirmed
Research-based editorial assessment

Our verdict

A plain black long-sleeve compression top with a published fabric blend and sizes up to 3XL. It is the lowest-cost rash guard in this category, sold directly by RDX's UK store.

RDX confirms an 83% polyester, 17% spandex compression fabric with "tightly interlocked flat seams", sold in sizes S to 3XL. RDX markets it across MMA, BJJ and other training rather than as a grappling-specific design. The product page does not mention any waistband grip or anti-ride-up feature.

It comes only in black, so it is not a ranked (belt-colour) rash guard. RDX's other claims, such as quick drying, are the manufacturer's and were not independently tested.

Best suited to

Beginners who want an inexpensive long-sleeve rash guard for MMA and no-gi classes, including larger sizes up to 3XL.

Consider skipping if

You want a waistband grip to stop the top riding up (see the Hayabusa Apex Core). You want a ranked (belt) colour for IBJJF no-gi competition (see the Tatami ranked rash guard).

The Fight Store editorial assessment
  • Comfort
  • Durability
  • Value

Research-based editorial ratings — not customer reviews.

Pros

  • The lowest price in this category, sold directly by RDX's UK store
  • Fabric blend published by RDX: 83% polyester, 17% spandex
  • Six sizes, S to 3XL

Cons

  • No waistband grip or anti-ride-up feature stated
  • Black only - not a ranked range
  • General cross-training positioning rather than a grappling-specific design

Why we rated it this way

Rated on Comfort, Durability and Value only - this is apparel, and a Protection star score would imply a protective function it does not have.

Comfort (3): a confirmed compression fit and flat seams, but no waist-retention feature.

Durability (3): no independent durability evidence.

Value (4): the lowest price here with a published fabric blend and sizes up to 3XL.

Sources

  • Manufacturer — RDX's own UK product page - 83% polyester/17% spandex, compression fit, flat seams, sizes S-3XL, black only, and the GBP purchase route.

Methodology: research-based (not hands-on tested) · How we review products

Last reviewed 2026-10-13 · Last verified 2026-10-13

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