The Louis Garneau Sirocco Tank top is exactly what you need on a hot ride and absolutely nothing else. It's soft, lightweight, and extremely breathable. Even so, it still provides UPF 50 sun protection, so you won't burn up while you don't burn up. Except for the inner bra and back pocket, the Sirocco is made entirely from Garneau's Lite Skin Sens fabric, which is as soft as cotton to the touch but has all the moisture wicking and breathability of polyester. The bra and back pocket are made from an open mesh that keeps the weight to a minimum and forces cooling air through the jersey. The fit is Garneau's ProFit, which is next to skin snug to eliminate bunching. Even so, the stretchy nature of the fabric provides an unlimited range of motion. The jersey is finished with a zippered media pocket, complete with cord port, and reflective details to make you more visible in traffic.