10 Best Long Sleeve Swim Shirts 2025 in the United States

The Kanu Surf Men's Standard Short Sleeve UPF 50 Swim Rash Guard Sun Shirt promises excellent sun protection with a UPF 50 rating, making it ideal for outdoor activities. The quick-dry, moisture-wicking fabric ensures that you stay comfortable and dry, even during intense activities like swimming or running.

Its lightweight, breathable material combined with raglan sleeves and flat-lock seams enhances comfort for all-day wear, reducing irritation and chafing. This shirt is both durable and retains its shape and performance after multiple washes, which is great for regular use. The design is versatile, allowing it to function well for various activities beyond swimming, such as fishing, hiking, and running.

However, it's important to note that this shirt is short-sleeved, which may not provide as much coverage as a long-sleeve swim shirt. Those seeking maximum sun protection might want to consider this limitation. Additionally, while the polyester fabric is durable, some users may prefer a blend that includes natural fibers for a different feel. The simple pull-on closure adds to the ease of use, and it's convenient that it's machine washable. This shirt is a solid choice for those looking for a reliable, multi-use sun protection garment, but shouldn't be mistaken for a long-sleeve option.

The O'NEILL Men's Standard O'Neill Basic Skins UPF 50+ Long Sleeve Sun Shirt in white, size large, is a versatile option for anyone engaging in water activities. It is made from a comfortable blend of 87% polyester and 13% spandex, which offers both durability and flexibility. The shirt provides excellent sun protection with a UPF 50+ rating, making it a great choice for long days at the beach or on the water.

The shirt is recommended by the Skin Cancer Foundation, ensuring that it effectively blocks harmful UV rays. The slim fit design ensures it fits close to the body without being too tight, offering a balance between comfort and performance. The minimal seam placement is a thoughtful feature that enhances comfort by reducing the risk of rashes during activities like surfing or swimming. One drawback is the 'hand wash only' care instruction, which may be inconvenient for some users who prefer machine-washable garments.

Additionally, the shirt's white color, while stylish, may show stains and wear more easily over time compared to darker colors. This sun shirt is particularly well-suited for surfing, swimming, paddle sports, boating, and general beach use. It's a solid choice for those looking for effective sun protection and comfort without sacrificing mobility.

The O'Neill Wetsuits Men's Basic Skins UPF 50+ Long Sleeve Rash Guard is designed for various water activities, including surfing, swimming, and paddle sports. This shirt is made from a blend of 87% polyester and 13% spandex, offering a comfortable yet durable construction. The 6-ounce fabric ensures a form-fitting, tight layer that fits like a second skin, which can be beneficial for active movements in water. It also features a UPF 50+ rating, providing excellent protection against harmful UV rays, a crucial factor for long hours under the sun.

The flatloc stitching and minimal seam placement help reduce the chances of skin irritation and rashes, enhancing comfort during extended use. Additionally, the shirt is quick-drying and has a four-way stretch, making it practical for various water sports and beach activities. The performance fit, being very form-fitting, may not be comfortable for everyone, especially those who prefer a looser fit. Also, the pull-on closure might not be as convenient for taking on and off compared to zippered options.

Despite these minor drawbacks, this rash guard is highly recommended for individuals who spend a lot of time in the sun and water, offering both protection and performance.