THE TOP MOUNTAIN BIKE JERSEY FOR RIDING IN HOT CONDITIONS. On hot and humid days, you need an MTB jersey that works as hard as you do. The Flexair Delta™ Long Sleeve Jersey improves riding during the warmer months using Polartec® Delta™ fabric - an innovative fabric that acts like mini radiators to keep you cooler, drier, and comfortable. The jersey has a contoured fit with 4-way stretch for maximum mobility. A densely knitted sleeve provides abrasion resistance in key areas, making the Flexair Delta one of the most versatile jerseys in our line. FEATURES Polartec® Delta™ cooling technology Densely knit sleeve is close fitting and provides added abrasion resistance Bonded cuffs and collar for complete comfort Mountain bike specific tailoring Drop tail back panel for bike-specific coverage Length (HPS): 31", size large MATERIALS Body: Polartec® Delta™ 51% polyester, 45% Tencel, 4% spandex Sleeve: 85% nylon, 15% elastane