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 2.0 Core Technology I-beam core construction with flex controlled at the rails using high density foam - an engineering feat developed for performance. I-Bolic 2.0 Technology offers the same speed, control, strength and response as the original, but with increased strength due to a fully engineered carbon strip inlay on the bottom deck and an updated look.