Rhythm Hallmark Cap in Brown. Rhythm Hallmark Cap in Brown. 100% cotton. Hand wash. Front logo detail. Ventilating eyelets at top. Adjustable back strap. Twill fabric. Brim measures approx 2.5 in length OS measures approx 26 in circumference. RHYT-MA17. 0725M-HW11-SAN. Rhythm brings together a unique group of designers, artists, musicians, surfers and snowboarders with a shared dream of creating a livelihood doing what they love. Drawing on influences frim the worlds of art, and music Rhythm is for those who yearn for new frontiers over the well worn path.