If you don't want to roast while you ride this summer, the Sugoi RS Sleeveless Base Layer is right up your alley. It's cut to fit snug, which helps to keep you dry when you're working up a sweat. And with a high tech fabric that's not only cooling, but UV ray blocking, all you'll need to think about is staying hydrated, and turning those pedals over. Sugoi built the RS base layer out of its IceFil fabric, which, as the name implies, has a bunch of cooling tech built in, as well as being highly adept at wicking moisture away from your skin. In addition to a UPF 50 UV blocking rating, it's treated with Xylitol. That's right, the same Xylitol that gives mint gum its cool, tingly taste is employed to produce a cooling effect when you're heating up. The RS base layer is designed to fit under a Sugoi pro fit jersey, which means that it's intended to fit snug, without any loose material. The Sugoi RS Base Layer Sleeveless Men's is available in five sizes, from Small to XX Large, and in the color White.