"What Our Gearhead® Experts Are Saying:""I've worn a lot of base layers under a chamois and the GOREWEAR Base Layer Brief is one of the more thoughtful ones I've tried. The polypropylene fabric moves moisture away fast enough that I stopped noticing it on longer rides, and the flatlock seams sit completely flat so there's nothing to rub against you over the course of a few hours in the saddle.""The ride itself demands enough of your attention without your kit working against you. The GOREWEAR Base Layer Brief is designed to disappear once it's on, handling the behind-the-scenes work of moisture management so you stay focused on the road or trail ahead. GOREWEAR built this brief specifically for the demands of cycling, where fit and friction matter more than almost anything else. The 91% polypropylene fabric is thin, soft, and exceptionally efficient at pulling moisture away from the skin and keeping it moving. A brushed elastic waistband sits comfortably at the hip without digging in over long efforts, and the flatlock seams are placed and constructed to eliminate pressure points entirely. At just 1. 5 ounces, you'll forget it's there until you realize how much more comfortable you are than you'd otherwise be."