2XU Men's Dark Shield LD Trisuit 71% Polyamide Micro/29% Elastane Imported Y Elastic Grip for comfort and security 2XU DARK SHIELD fabric with Swiss 'Coldblack' treatment to reflect IR Heat Rays for exceptional cooling Front Semi-Lock Zipper Elite LD Fusion welded, perforated chamois for ventilation and impressive quick drying capability for the ultimate in comfort and performance Extremely lightweight, cool, and quickdrying