A rash guard is a piece of gear you wear session after session. The best one for you fits your body, suits your training conditions, and holds up to the way you train. Here’s what to look for.

Fabric weight and blend

Check the fabric specification. Polyester and spandex blends combine flexibility with a close fit, but fabric weight, construction and stretch all affect how a rash guard feels. If you train somewhere warm—and we design in Maui, so we know warm—pay particular attention to breathability and comfort. Try moving your shoulders and taking a full breath before deciding that a tighter fit is better.

Sublimation versus surface printing

Sublimation colors the fibers rather than adding a printed layer on top of the fabric. That means the design has no surface layer to peel away. Surface-printed graphics can wear differently, depending on the print process and care. If a listing doesn’t explain the printing method, ask the brand. Every Savage Brand rash guard is fully sublimated.

Seam construction

Look for flatlock stitching and inspect the underarms and other high-stress areas. Flat seams help reduce the raised ridges that can rub against your skin during long rounds. Clean construction and comfortable placement matter as much as the name of the stitch.

Mesh and breathability

Mesh panels have an open structure that helps heat and moisture escape. For a humid gym, long no-gi sessions, or someone who runs hot, ventilation can be a useful part of choosing a rash guard.

Look at where the mesh is placed. Savage’s AirTek line uses mesh under the arms that extends along the sleeves, on both short- and long-sleeve versions. It’s designed to provide ventilation beyond a small underarm patch.

Choose based on your climate and training preferences. Compare how the fabric feels against your skin, how it stretches and how it performs in your own sessions. A solid-panel design may suit someone who prefers more coverage or trains in cooler conditions.

Fit and compression

A rash guard should fit closely enough to avoid loose fabric shifting or bunching during grappling. It should still let you breathe fully and move your shoulders comfortably. Use the brand’s size chart rather than assuming your usual size carries over. If you are between sizes, check the fit guidance or ask for help before ordering.

Sleeve length

Long sleeves cover more skin and can help reduce direct contact with the mat. Short sleeves leave more of your arms uncovered. Your comfort, gym conditions and preferred coverage are the best guide; some grapplers keep both in rotation.

Competition rules

Check the current rules for your event before buying competition gear. IBJJF’s published no-gi requirements specify black, white, or a combination with at least 10% of your belt-rank color; a shirt entirely in your rank color is also permitted. These are rank colors, not academy colors. Check the full IBJJF uniform requirements and your event information for the details that apply to you.

Does the company stand behind it?

Read the warranty and care guidance before you buy. Check which products qualify, what damage is covered, the coverage period and how to submit a claim.

Savage AirTek rash guards carry a full one-year warranty against defects, rips, tears and snags during training. Other Savage rash guards and fight shorts are covered for one year against defects in materials, stitching and sublimation. If a covered issue occurs within twelve months of purchase, we replace the item. Read the Savage Brand One-Year Warranty for coverage and claim instructions.

Choose for the way you train

The best rash guard is the one suited to your climate, training volume and body. Savage gear is designed and tested in Maui, Hawaii, in real training. Explore the StreetJitsu collection and compare the fit and sleeve options for your next session.