Columbia

Freezer Zero II Arm Sleeve

A UPF rating, or Ultraviolet Protection Factor, measures how much UV radiation can penetrate a fabric. For example, a UPF rating of 50 means that only 1/50th of the sun's UV rays can pass through, offering excellent protection against sunburn and skin damage. Choosing clothing with a high UPF rating is essential for outdoor activities to help protect your skin from harmful UV rays.

Form-fitting clothing is designed to closely follow the body's contours, providing a snug fit that allows for ease of movement. This type of clothing is often made from stretchy materials, which can enhance comfort and performance during workouts or sports by reducing excess fabric that can cause chafing or distraction.

An arm sleeve covers the arm from the wrist to the upper arm, offering protection from the sun, abrasions, and even minor injuries. They are particularly useful in sports and outdoor activities, as they can help keep your arms warm in cooler weather and shield your skin from UV rays, making them a great addition to your gear.

Thumbholes are openings at the end of sleeves that allow you to insert your thumbs, helping to keep the sleeves in place. This feature provides additional coverage for your hands and can be especially beneficial in cold weather or during physical activities, ensuring that your sleeves don’t ride up and that you stay comfortable and warm.

Sweat-activated cooling is a technology in certain fabrics that helps regulate your body temperature when you sweat. These fabrics wick moisture away from your skin and promote evaporation, which cools you down as you engage in physical activities. This feature is particularly beneficial for athletes or anyone exercising in warm conditions, as it helps maintain comfort and performance.

Clothing with high UPF ratings provides essential protection against harmful UV rays, reducing the risk of sunburn and skin damage during outdoor activities. Additionally, sweat-activated cooling technology helps keep you comfortable by regulating your body temperature as you sweat. Together, these features enhance your overall experience, allowing you to focus on your activities without worrying about sun exposure or overheating.