100% Baumwolle (Heather Grey: 90% Baumwolle / 10% Polyester; Heather Blue, Heather Dark Grey: 60% Polyester / 40% Baumwolle; Heather Graphite: 50% Baumwolle / 50% Polyester; Heather Navy: 65% Polyester / 35% Baumwolle)