Best Diving Rash Guard Shirts for Men of 2026

"I'm genuinely impressed by how lightweight, breathable, and soft these sun shirts feel—ideal for spending hours outdoors. They keep me cool even in humid weather, provide dependable UV protection, and the fit is just right. I love how quickly they dry, making them perfect for hiking, fishing, or beach trips. After washing, I noticed no fading or shrinking. Excellent value for the quality."

"These shirts are a staple for me because they work perfectly year-round—as a base layer in winter or a protective sun shirt in summer. The material is light and wicks moisture, so I always feel dry. The fit is true to size, though I wish it was a bit longer for my tall frame. Durability is top-notch, with no seam issues at all."

"For outdoor work or just relaxing, this shirt is smooth and cool like silk. I appreciate the UPF sun protection and heavy-duty stitching. It’s comfortable enough for work or sleep, and I feel secure wearing it for any activity."

"I've bought several of these shirts and the quality is top-notch with durable stitching and smooth, comfortable material. I wear them for everything from working outside on the ranch to hitting the water park, and the cooling effect and UV protection are fantastic. I actually prefer this shirt over other major brands—it dries fast and fits perfectly as a base layer under body armor too."

"I ordered the O'Neill Basic Skins L/S Crew Rashguard in Fog Blue and was impressed by how tightly it fits—just like a second skin, as designed. For reference, I'm 5'8", 165 lbs, and the Large is snug but comfortable for my athletic build. If you're self-conscious or prefer a looser fit, definitely consider sizing up. The material feels high quality and offers great sun protection."

"I used this rash guard for SCUBA diving in the Florida Keys and found the material stretchy and lightweight, making movement easy. The size chart worked well for me (5'10", 145 lbs, S), and even after a full day on the boat and in the sun, it kept me cool and protected. For those wanting a more relaxed fit, I'd recommend ordering a size up."

"I've used this Thermo X top for kayaking in freezing temperatures, layering it under my dry suit, and it performed exactly as I hoped—kept me warm even in the 20s. Compared to other thermal shirts, this one fits tighter and feels noticeably warmer. Sometimes it's worth paying more for the right gear, and this is one of those times."

"I swim laps outside, even when it's cold, and this shirt has made a huge difference in comfort. The fit is snug so it doesn't let water in, and I followed the advice to order one size up. It's a bit tough to take off once wet, but the warmth and fit are great for chilly pool sessions."

"I only trust O'Neill's sizing—it always works for me. This top is thin but surprisingly warm, and it fits like a glove. When I'm paddling, I don't even notice I'm wearing it, except for the extra warmth. It's perfect for windy, cooler days when I still want to be out on the water."

"I've purchased several of these O'Neill rashguards for myself and my grandkids and have always been impressed with the top-notch quality and sun protection. For sizing, I found that going up one or two sizes from my regular t-shirt gives a looser, more comfortable fit, which I prefer for the beach. The material is durable, tightly woven, and totally shields my fair skin from sunburn, even outperforming SPF 50 sunscreen. My grandkids have worn theirs for years in both pools and the ocean with no issues. These shirts are also great for wind protection and hold up well over time."

"I picked this shirt up for a trip to a water park and was really pleased with the total sun coverage and comfortable feel. I typically wear a large but went with an XL for a more relaxed fit, and it worked out perfectly—kept me cool, hid my love handles, and looked great. I didn't have to reapply sunscreen, and the shirt gave me confidence walking around all day, burn-free."

"I usually wear XL but tried an XXL based on recommendations, and found it was a bit looser than I needed—sticking with my normal size would have been better. The shirt has a quality feel, dries quickly, and offers excellent sun protection. Only minor gripe is it can hold some water after swimming, and I wish it had the advertised connector for board shorts, but overall I'd buy it again for both water activities and casual wear."

"As a water skier, I really appreciate how this rash guard is skin-tight and doesn’t ride up, providing excellent protection for my back, shoulders, and arms against sunburn. It fits very snug, just as it should. If you’re not looking for a tight fit, you may want to size up or consider a different product."

"After trying several brands, O’Neill rash guards have proven to be superior in quality for my frequent lap swimming. The panel construction hugs my body well while allowing maximum movement, and the flatlock seams are both secure and non-irritating. Once in the water, it feels almost invisible and truly stays in place, which is a huge plus."

"I’ve had trouble with other 'swim shirts' being too baggy and uncomfortable, but this one fits like a second skin and doesn’t twist or shift when I’m swimming. It’s comfortable, dries quickly, and the sun protection is outstanding—I can spend hours in the sun without worrying about burns. The only minor issue is that the sleeves aren't very stretchy and can get a bit tight after a while, but overall, it’s exactly what I wanted."

"I've been using this both in and out of the water, and I’m consistently impressed by its warmth and breathability. It’s not quite as warm as 2mm neoprene, but it’s much more comfortable, especially since I can wear it under a wetsuit or on its own for body surfing when it’s chilly but not cold enough for a full wetsuit. The added safety for boating or fishing in cold weather is a huge bonus, and it really helps slow the onset of hypothermia if you fall in."

"This shirt is a game-changer for snorkeling—super comfortable and warm. I just wish they made a version specifically for women, but even so, it’s the best option I’ve found for staying cozy in the water."

"I don’t know what kind of magic this material uses, but I’m thrilled I got one. It feels like a lightweight, warm cloud in the water and keeps me much warmer than a standard rash shirt. Once I wring it out, it dries impressively fast, and the fit is tight but doesn’t restrict movement. I’m seriously considering buying several more in case they stop making them!"

"I use this rash guard every time I go surfing in Waikiki, and it’s been fantastic for sun protection and shielding my chest from irritation. At 6'2" and 185 lbs, I find the fit is snug just as intended."

"As a 5'9", 190 lb woman with broad shoulders and a long torso, I opted for the men’s version, and it fits me perfectly while providing solid compression and breathability. I can spend hours outdoors with zero sunburn. Just a heads up: different colors may fit tighter, so double-check sizing."

"I bought this for my trip to Mexico and Central America, and I was totally satisfied with how it performed for both hiking and swimming. It held up great during an active day and worked well in the water with sea lions."

"I tried several big-name brands before finding this rash guard, and I'm genuinely impressed by the superior fabric quality and spot-on fit. The color matched my gear perfectly, and the material feels both light and rugged. I ordered a medium, and at 5'8" and 144 lbs, it’s a firm, flattering fit—just a tiny bit loose in the chest, but otherwise perfect. I loved it so much, I immediately bought another to match my dive gear!"

"After six months of regular use, I can confidently say this rash guard is exceptionally durable and maintains its shape, even with frequent washing. I love the slightly looser shoulders and snug hips, which help keep it in place. The fabric breathes well, and I just ordered another in a smaller size after losing some weight."

"I initially bought this rash guard for its affordable price, but it exceeded my expectations with its true-to-size fit and comfortable design. The mesh panels add great ventilation without being see-through. If I could change anything, I’d add some grip at the hem to keep it from riding up, but overall, it’s held up perfectly after months of training and washing."

"I absolutely love these rash guards—they're perfect for snorkeling, diving, or just relaxing on the boat when the sun is intense. I appreciate the quality construction, the variety of colors, and the stylish contrast stitching on the dark blue one."

"I bought this shirt for a Hawaii trip and wore it both in the water and on the beach. It gave me fantastic sun protection—my arms and torso didn’t burn at all. The fit is comfortably loose, and it feels great when swimming. It does get a bit warm in direct sun on dry land, but a splash of water helps. For water activities, it’s excellent."

"The fit is true to size, and the colors are super vibrant. It’s lightweight and keeps me cool on breezy, sunny days at the beach, even though I haven’t tried it swimming yet."

"I spent over 10 hours outside on a 98° day and this shirt completely protected me from sunburn. Even when it got wet, it kept me extra cool. I honestly rate it a 10/5 for performance."

"After trying one, I liked it so much I bought another. At 5'11'' and 180 lbs, I found the XL to be much more comfortable than the large. It's now a staple in my travel gear for warm weather adventures because it lets me skip so much sunscreen."

"I swim in this shirt and never burn anymore. It looks great and does exactly what it's supposed to do. I couldn't be happier with the protection."