Iconic Spyglass Ladies Golf Armwarmers. Arm warmers are handy layering sleeves to keep your arms warm when temperatures vary and you prefer to wear a short sleeve shirt for the warmer part of your activities. The Iconic Spyglass armwarmers are perfect for cool morning rounds which warm up by the turn or late rounds which turn chilly by the last few holes. We use a fine gage, very fine denier microfiber fabric which is warm but lightweight with resilient stretch so it doesn't impede your swing or get baggy. Our arm warmers are inherently UV protective at the highest available rating, UPF 50+, for over 98% blockage of UVA and UVB rays that won't wash off or wash out – your dermatologist will love it. They are very comfortable with a great feel and wick perspiration, inhibit odor (anti-microbial). Plus they're machine washable and easy to keep tucked in your bag for unpredictable weather. Great for other outdoor activities as well! Our armwarmers are in unisex sizes XS to XXL. The top of the sleeve should be worn in the narrower part of your upper arm above the bicep. Pick the size which fits snugly at the top but is comfortable while swinging, typically this will be your shirt size plus or minus one size. We suggest that any extra length be gathered at the wrist to avoid wrinkling at the elbow or upper arm.