Channel Islands Double Helix Surfboard Channel Islands Double Helix Surfboard from Sean Horning Channel Islands Double Helix Surfboard Contributed to the design and development of Channel Island's Double Helix revolutionary surfboard design. View PDF View PDF gLike Channel Islands Double Helix Surfboard Contributed to the design and development of Channel Island's Double Helix revolutionary surfboard design. Product Design Share R 7 n Sean Horning Project Engineer - Helmets (RED / anon) at Burton Snowboards Burlington, VT Follow Contact