Thermoflex Luxurious Fleecy WarmthIf you don't need the extra wet weather protection of Nano Flex, or if you've always been happy with traditional warmers, you'll find that Castelli's Thermoflex warmers...
Surprisingly UsefulWe can officially only rate these warmers at UPF 50+, but in our laboratory tests, they actually blocked 99.8 percent of damaging UV rays. We used a polyester base...