The Leatt Gravity 4. 0 Long-Sleeve Jersey runs on mesh fabric with air channels that move heat off the body through the hardest climbs and longest shuttle days. X-Flow Mesh technology keeps that airflow working exactly where riders sweat most, paired with a moisture-wicking finish that keeps the fabric from holding onto it. Brush Guard reinforcement, an ultra-thin film layered over the elbows, adds scratch and abrasion resistance without adding noticeable weight. What Our Gearhead(R) Experts Are Saying:"This jersey holds a slim, race-ready cut instead of the roomier trail fit, but it still stretches enough to clear a chest protector and neck brace without pulling tight through the shoulders. I get full extension reaching for the bars through rock gardens, geared up or not."