2XU Tech Speed X Run Top SS14: This impressive Run Top is anatomically engineered to achieve the ultimate in moisture management. High-level antibacterial protection & thermo-regulation is also assured. Through the use of Xylitol & IR blocking, 2XU has engineered a fabric for endurance events like no other. Xylitol is embedded in the yarn of the fabric to draw heat from the body & IR blocking inhibits penetration of infrared rays to lower skin temperature by up to 5.4&176;F. The application of ICE X to polyester/elastane delivers heightened moisture management whilst high filament yarns & a higher gauge knit are utilized for a lighter, breathable fabric which also delivers compressive pressure. Flatlock Stitching Zoned Paneling Reflective Trims Raglan Sleeve Design Ice X