The Boss up is the bigger brother of the S Boss, Kelly's first-ever midlength. Designed by Dan Mann in partnership with Kelly Slater and Kevin Schulz, this utility midlength is the most well-rounded and versatile shape in the Slater Designs range, crafted to cruise across weak wave faces and grind through cavernous overhead tubes. The Boss Up is the board you would travel with if you could only bring one board with you. Your one board quiver with maximum performance in a purely versatile package. Recommended to ride roughly +13 liters more volume than your standard shortboard, paired with the KS1 5 Fin Template configured as a Quad. *** I-Bolic Core Technology I-beam core construction with flex controlled at the rails using high density foam - an engineering feat developed for performance. Volcanic Lamination Technology Forged in fire, this Basalt lamination technology is our sustainable alternative to carbon, and is our most durable with elevated response.