Techstar Knif JerseyTechstar Knif Jersey is constructed from lightweight, high durable, stretch fabric with a moisture-wicking treatment for comfort and performance.Ergonomically engineered cut and optimized racing multi-panel pattern for enhanced freedom of movement and mobility.Incorporated laser-cut perforations on chest and arms for ventilation.Strategically positioned stretch inserts for superior freedom of movement.Flat stretch construction on arms and shoulders for range of movement and rider comfort.Innovative construction utilizes no side seams and no underarm seams for comfort.Seamless bonded collar for ease of use and enhanced comfort and seamless bonded cuffs.Rear is extended for greater coverage in riding position and compatibility with Alpinestars' MX pants.