High Times Covers Pattern Snapback HatGrassroots began making hats for a documentary film they were producing in 2009 and has since created fitted hats for some of the biggest names in the industry including Method Man, Cheech and Chong, Griz and Jerry Garcia. Paying the finest attention to detail, GRC uses such fabrics as hemp, recycled soda cans, ballistic material and even adding holograms onto the brim.