How to Choose a Men's Rash Guard for Surfing and Swimming
By Asana Hawaii | Check out our exclusive deals on Island | Published: 2026-10-26
Category: How-to Guides
Learn how to pick a men's rash guard for surfing and swimming: fit, fabric, UPF protection, and care tips to keep it lasting.
Quick answer
For surfing and swimming, choose a long-sleeve men's rash guard with a snug but comfortable fit, 38-40 UPF fabric, and flat seams to prevent chafing. Prioritize polyester-spandex blends for stretch and quick drying.
Why fit matters more than you think
A rash guard that is too loose will flap in the water, create drag, and let sand and sun reach your skin. One that is too tight restricts movement and can feel uncomfortable during a long surf session. The right fit hugs your body without squeezing, allowing full range of motion for paddling and swimming.
Most rash guards are slim-fitted, so if you are between sizes, consider sizing up if you prefer a looser feel. Check the size chart and measure your chest and waist to find the best match.
Fabric and construction: what to look for
The fabric blend determines stretch, durability, and drying time. A polyester-spandex mix (like 82% polyester, 18% spandex) offers excellent flexibility and retains its shape. Flat ergonomic seams reduce chafing, which is crucial when you are paddling or swimming for hours.
Look for a rash guard with UPF sun protection. A 38-40 UPF rating blocks most UV rays, but remember that no fabric blocks 100% of UV radiation. For extended sun exposure, pair it with sunscreen on exposed areas.
Sleeve length and body length considerations
Long-sleeve rash guards provide more coverage and are ideal for surfing and swimming, especially in strong sun. They also protect against wind and sand. A slightly longer body—longer than a casual tee—keeps the rash guard tucked in during movement, preventing it from riding up.
If you are swimming laps or surfing in warmer water, you might prefer a short-sleeve style for more freedom, but long sleeves offer superior UV protection.
Step-by-step guide to choosing your rash guard
- Decide on sleeve length: For surfing and swimming, choose a long-sleeve rash guard for maximum sun protection and coverage. Short sleeves are better for hot days if you prioritize freedom of movement. Long sleeves are the default for all-day water sports.
- Check the fit: Try it on and move your arms overhead and side to side. The rash guard should feel snug but not restrictive. If it lifts up when you raise your arms, it is too short. A proper fit prevents chafing and keeps the rash guard in place.
- Look at the fabric and seams: Choose a polyester-spandex blend for stretch and quick drying. Check for flat ergonomic seams to minimize chafing, especially under the arms and along the torso. Flat seams are a must for long sessions in the water.
- Verify sun protection: Look for a UPF rating on the label. A rating of 38-40 UPF is good for most conditions, but remember to apply sunscreen to exposed skin and reapply after swimming. UPF is your first line of defense, but not the only one.
- Consider care and durability: Rinse your rash guard with fresh water after each use and let it air dry. Avoid wringing it out or using a dryer, as heat can damage the spandex and reduce its lifespan. Proper care keeps the fit and fabric intact longer.
Rash guards that fit the bill
- Asana Hawaii Banyan's Surf Men's Rash Guard: This long-sleeve rash guard is made of 82% polyester and 18% spandex, with 38-40 UPF sun protection and a fitted design. The stretchy fabric and UPF rating make it a solid choice for surfing and swimming, protecting you from sun and chafing.
Asana Hawaii Banyan's Surf Men's Rash Guard - Asana Hawaii ʻAnaehoʻomalu Men's Rash Guard: This rash guard features flat ergonomic seams and a comfortable long body, made from the same polyester-spandex blend. Flat seams reduce irritation, and the longer body keeps it in place during active water sports.
Asana Hawaii ʻAnaehoʻomalu Men's Rash Guard - Asana Hawaii Geo Surfer Men's Rash Guard: A long-sleeve rash guard with 38-40 UPF fabric and a fitted design, part of the Geo Surfer collection. It offers similar sun protection and comfort, with a unique style for those who want a distinct look.
