Even a mid-summer day can have its temperature variations, especially if your route runs through shade-dappled canyons and winding climbs, and having a Louis Garneau Supra Sleeveless Baselayer hiding under your jersey can make all the difference in staying comfortable. Its lightweight fabric breathes easily to usher moisture out and away to keep you cool and dry over the miles while a sleeveless profile pairs with any number of sleeved or sleeve-free jerseys.