The Leader Graphene channels the same design of your favorite Spyder fleeces, while incorporating industry-leading Graphene heat conduction technology.Graphene helps to reach warmth equilibrium throughout the fleece by moving heat from warmer areas to colder areas, yielding more warmth where you need it, and less where you don´t.Whether as a standalone piece around town or under your jacket on the coldest days on the hill, the Leader Graphene Fleece has you covered.