Using threadless bonding technology, the seams are welded together to create flat, durable & non-abrasive surfaces throughout the jersey. Both the sleeves & the front meanwhile have been engineered with a custom all-over abstract pattern thats perforated for increased air flow, faster drying & best moisture wicking possible. This jersey also keeps you cool with its next-to-skin xylitol printed back panel that reacts to body heat & sweat to create a cool sensation especially when wearing a pack. & for additional ventilation theyve added laser perforations between the shoulder blades to keep the air flowing as you ride.