Even on our hottest rides, it's best not to go out with only bibs. The Giordana Lightweight Tubular Knit Short-Sleeve Baselayer Top provides the lightest layer possible, and even as we break a sweat, we stay dry for maximum comfort. The secret is Dryarn fibers in a tubular knit, packing in high-density coverage where we need it and loose, airy designs where we don't.