10 Best Men's Loose Fit Rash Guards 2025 in the United States

The Kanu Surf Men's Standard Short Sleeve UPF 50 Swim Rash Guard Sun Shirt is crafted from 100% polyester, making it lightweight and breathable. The quick-dry, moisture-wicking fabric ensures that you stay cool and comfortable during various activities such as swimming, fishing, running, or just lounging at the beach. This shirt excels in providing all-day comfort due to its soft fabric, raglan sleeves, and flat-lock seams that reduce irritation and enhance mobility.

The UPF 50 rating offers excellent sun protection, making it a reliable choice for outdoor adventures by shielding your skin from harmful UV rays. This feature is particularly beneficial for those who spend extended periods outdoors. Its versatile design means it can be used not only as a swim shirt but also for fishing, hiking, or running. This multipurpose use adds to the product's value.

Potential buyers should be mindful that the shirt is pull-on, which might be less convenient for some. Additionally, as it is manufactured in China, the product’s quality and durability may vary, and it is essential to follow the care instructions (machine wash) to maintain its longevity. The grey color and standard design may not appeal to everyone, as some might prefer more vibrant colors or patterns. This rash guard is a solid option for those looking for comfort, sun protection, and versatility in their outdoor gear, although it may not stand out in terms of style.

The O'Neill Wetsuits Men's Standard O'Neill Basic Skins UPF 50+ Long Sleeve Sun Shirt offers several strong features for those looking for a rash guard. Made from a comfortable yet durable blend of 87% polyester and 13% spandex, it provides a good balance of flexibility and long-lasting wear. The UPF 50+ rating ensures excellent ultraviolet protection, making it suitable for various outdoor activities including surfing, swimming, and paddle sports. This shirt is also recommended by the Skin Cancer Foundation, adding to its credibility in sun protection.

The overlock stitched seams are designed to be super-strong, and minimal seam placement helps to reduce the risk of rashes, which is a major plus for active use. However, it is worth noting that this shirt has a slim fit, which means it fits close to the body but is not overly tight. This might not align with the expectations of someone specifically seeking a loose-fit rash guard.

Additionally, the color and design are quite basic, offered in a solid black, which might not appeal to those looking for more vibrant or varied options. Lastly, the care instructions recommend hand washing, which could be inconvenient for some users. Despite these minor drawbacks, the product's strengths in material quality, protection, and comfort make it a solid choice for those needing reliable sun protection during water activities.

The O'Neill Men's Basic Skins UPF 50+ Short Sleeve Rash Guard stands out with its excellent sun protection, boasting a UPF 50+ rating, which is endorsed by the Skin Cancer Foundation. This feature makes it a great choice for those who spend extensive time in the sun, whether surfing, swimming, or engaging in other water activities. The material blend of polyester and spandex makes it both comfortable and durable, ensuring it withstands regular use.

It’s worth noting that this rash guard is designed with a performance fit, meaning it fits tightly like a second skin. This can be beneficial for minimizing drag in the water but may not be suitable for those looking for a looser fit. The minimal seam placement is a thoughtful addition, reducing the risk of chafing and enhancing comfort during prolonged wear. Its short sleeve design provides some coverage while allowing for ample movement. The rash guard's simple black color is versatile, though it may not offer the variety some might desire for style.

Care instructions recommend hand washing, which could be a slight inconvenience for those accustomed to machine washing. Weighing just under 10 ounces, it's lightweight and easy to pack for trips. This rash guard is best suited for individuals who prefer a snug fit and prioritize sun protection and comfort during water sports or beach outings.