Custom made in the USA by Swiftwick. Slide on these form fitting Olefin arm warmers and you'll be thrilled by the comfort and warmth provided. As the only Nobel Prize winning fiber, Olefin retains less than .01% of its weight in moisture – so much so, that it floats. This produces a fast drying, lightweight sleeve with incredible breathability, superb abrasion resistance and outstanding wear. Another key feature is the 200 Needle Construction. This is a much higher than standard industry practice and allows for less air permeability with wicking power.
One size fits all.