Winter running is all about mastery of the art of layering. The formula comes down to three layers: one for dealing with your sweat, the second for heat retention, and the third for wind and water protection, if necessary. Our GhostFleeceTM program was developed to keep you warm and dry during runs or outdoor activities in cold conditions. Constructed with Polartec® Power GridTM, the geometric patterns in the fabric provide both insulation and breathability at the same time. GhostFleece is available in a selection of second layers, for all types of runs. Run free in the cold, don't let the cold run you.