How to Choose the Best Rash Guard for Sun Protection & Comfort
Spending long days outdoors in the water is one of life’s great pleasures, but protecting your skin from harmful UV rays is just as important as enjoying the surf. A rash guard is more than just a water shirt; it’s a piece of essential gear designed for sun protection, comfort, and performance in all kinds of water sports. With so many styles, cuts, and features available, knowing how to choose the best rash guard for sun protection & comfort can make a huge difference in both safety and enjoyment.
Why Wear a Rash Guard?
A rash guard acts like a second skin, helping to block harmful UV rays and minimise skin irritation caused by surfboards, wetsuits, or saltwater. Whether you’re surfing, swimming, or snorkelling, the right rashie can prevent chafing, offer abrasion-resistant protection, and provide full sun protection with less reliance on sunscreen. Many modern quality rash guards also feature UPF (Ultraviolet Protection Factor) ratings, giving you maximum sun protection against UV rays.
Key Features to Look For
When choosing the best rash guard, it’s worth considering more than just the look. The right combination of materials, fit, and features will deliver solid performance and ensure you stay comfortable in the water.
1. Ultraviolet Protection Factor (UPF Rating)
The most important feature of a rash guard is its UPF rating. This indicates how well the fabric blocks harmful UV rays. A rating of UPF 50+ provides better protection, blocking at least 98% of UV sun protection exposure. This makes it ideal for surfers, divers, and anyone spending time outdoors in peak sun hours.
2. Fit & Comfort
The way a rash guard feels depends on the cut. A skin-tight or form-fitting style offers a performance fit, making it ideal for surfing and duck diving, as it won’t shift in the waves. A relaxed fit or looser fit option works more like a sun shirt or swim shirt, giving you added sun protection with extra freedom of movement. Your personal preference will help you choose between a snug athletic cut or a more casual t-shirt style.
3. Sleeve Length
- Long sleeve rash guard provides better protection for your arms and shoulders, ensuring added sun protection and extra warmth when the water is cooler.
- Short-sleeve rash guard – A cooler option for hot days, offering a balance between coverage and comfort.
Some water lovers also prefer a hooded rash guard for full sun protection, shielding the neck and scalp areas often forgotten when applying sunscreen.
4. Materials & Fabric
The best rash guards are made from durable, quick-drying fabrics such as nylon, polyester, or blends with recycled materials. Look for quick-drying properties, flatlock stitching or flatlock seams to prevent chafing, and flexible fabric that feels like a second skin.
If you're unsure which fabric suits your needs, our Chillproof vs T2 vs Rapid Dry comparison guide breaks down the differences in detail. Many other rash guards provide extra layer insulation for more warmth, making them suitable for cooler climates or as a base layer under wetsuits.
5. Additional Considerations
Quick-drying fabric ensures you’re not stuck in a damp top after getting out of the water. Abrasion-resistant material reduces wear when rubbing against surfboards or equipment. Some styles act as a budget rash guard, giving entry-level options for casual beachgoers. Higher-end quality rash guards offer solid performance with advanced features such as hooded rashguards, eco-conscious materials, and UV-blocking technology.
Rash Guards vs Swim Shirts
While most rash guards are designed for surfing and high-performance water sports, swim shirts or sun shirts are aimed at more casual use. They tend to have a loose fit, similar to a t- shirt, making them more comfortable for kids, families, or those who simply want worry free protection while at the beach or pool. For younger water lovers, our Junior Rashies collection offers purpose-built options with the same UPF protection in kid-friendly fits. Choosing between a rash guard and a swim shirt depends on how much added protection and performance fit you need.
Choosing the Best Rash Guard for You
The best rash guard is the one that combines sun protection, comfort, and durability to match your activity. If you’re surfing or paddling, a snug fit long sleeve rash guard with a high UPF rating will give you better protection against sunburn and skin rashes. For relaxed beach days, a looser fit sun shirt may be your ideal option. Whatever you choose, the right rashie offers peace of mind and worry-free fun in the sun.
Final Thoughts
Investing in a quality rash guard ensures you can enjoy long days by the ocean with maximum sun protection and comfort. From hooded rash guards to relaxed fit swim shirts, the key is finding the right combination of features that match your needs. At Sharkskin, we design performance-driven rashies and water apparel that deliver superior UV protection, comfort, and durability, browse our Rashies Collection to find quick-drying, UPF50+ options built for long days in the water.
