The Heat Map jersey is a record of watts produced and body heat expelled through the jersey´s cooling, breathable textile.It´s built on the endurance-tuned MILLE GT platform as a limited-edition release.The Heat Map jersey combines limited-edition graphics with our endurance GT platform.The result is a short-sleeve jersey for every riding application, from fast lunch rides to gran fondos to centuries - the MILLE GT´s cooling breathability is always critical for summer riding.The GT platform is set apart by its comfortable raw-cut sleeve construction and streamlined regularFit.Composition:- 73%PL 15%PA 12%EA.