10 Best Long Sleeve Swim Shirts 2025 in the United States

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.

The O'Neill UV 50+ Sun Protection Women's Long Sleeve Rash Guard is a great choice if you're looking for reliable sun protection during water activities like surfing, swimming, or paddle sports. It offers a strong UPF 50+ rating, which means it blocks 98% of harmful UV rays, helping protect your skin from sun damage effectively. The material is a blend of polyester and spandex, making the shirt stretchy and comfortable while still durable enough for active use.

It fits tightly like a second skin, which is ideal for performance because it reduces drag in the water and prevents chafing. The design features minimal seams, which is important to avoid irritation, especially when worn for long periods in the water. However, the fabric care requires hand washing, which might be less convenient than machine washable options. The Tahitian Blue color is attractive and suitable for beachwear.

This rash guard is well suited for women looking for sun protection and a snug, performance-oriented fit during water sports, although it may require a bit more care with washing.