What Our Gearhead(R) Experts Are Saying:"I rolled these on for a ride that started dry and turned drizzly by the second hour, and they never soaked through or budged an inch. The silicone grippers held even through some standing efforts on a climb. These stay in my bag no matter what the forecast says."Legs get cold before the rest of you notices, especially on descents when the wind cuts straight through and the effort drops off. The Castelli Nano Flex Evo Legwarmer solves that without asking you to commit to full tights before you know what the day actually holds. Water-repellent thermal fabric handles a surprise drizzle or a chillier-than-expected start, giving you coverage that comes off just as easily once the day warms up. Double-sided silicone grippers keep these anchored through hours of pedaling, climbing, and standing efforts, and flat-lock stitching means there's no seam digging in after a long day in the saddle. It's the kind of gear you forget you're wearing, which is exactly the point.