Its almost like this new pistonheads smiley logo has gone back in time to the heady times of peace and love in the swinging 60s you can see it now hippies cruising round haight ashbury in downtown san francisco rocking this psychedelic tie dyed logoour crew neck short sleeved mens t shirts are 100 premium cotton in a soft pre shrunk jersey knit our womens t shirts are lighter weight 150g tees made with deluxe 30s soft style yarns for a soft feel