Rhythm Retro Bloom Trunk in Black. - size 30 (also in ) Rhythm Retro Bloom Trunk in Black. - size 30 (also in ) 60% poly 35% cotton 5% spandex. Lace-up front with tie closure. Back flap pocket with button closure. 23 at the knee opening. RHYT-MX13. JAN18M TR01. 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.