What's inside your surfboard?

My foamie had a run-in with some rogue fins and got violently disemboweled. While staring into its guts, I thought—hey, maybe we should talk about how surfboards are made. In today's episode, I break down the difference between PU and EPS boards, what "feel" and "flex" actually mean, and why your shortboard is springier than your log. We'll go from foam blanks and stringers to fiberglass cloth and hot coats—and why you should never use polyester resin on an EPS board unless you're trying to reenact a surfboard horror movie. If you've ever wondered what's inside your board, why it feels the way it does, or why your ding repair kit melted your deck—this one's for you.