Blue Mist Equi Pro II Riding Helmet. Helmet is contoured to your head with padded lining for a soft, comfortable fit and is removable for easy cleaning. This helmet features front and back ventilation to help keep your head cool and dry. Helmet is equipped with adjusting nylon harness with smooth leather overlay. SEI Certified. Available Sizes: Small/Medium 6 1/2" - 6 7/8" & Medium/Large 6 7/8" - 7 3/8".