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The weight-optimized X-BIONIC® INVENT BIKE RACE ZIP SHIRT MEN is a high-tech pioneer for passionate cyclists. This groundbreaking model from the X-BIONIC® 4.0 generation has a super-light construction and benefits from the technological lead of Retina® ultra-high-definition manufacturing technology. The integrated award-winning 3D Bionic Sphere® system provides adaptive temperature compensation with precisely positioned functional zones. It warms you when you're cold and cools you when you perspire. Sweat Traps® collect perspiration and lead it to evaporation-intensive zones. The reinforced material of the Kidney Ribs insulates the temperature-sensitive kidneys and pelvis. Innovative material contours maximize wearing comfort and thus promote endurance: the streamlined design of the Dolphin Rider Neck is optimized for the zone where collar and helmet meet. The asymmetrically cut Flexor Arm Cuff prevents friction from slipped sleeves.