XTR 10 foam core technology uses extruded closed-cell foam that is 100% waterproof, offering unparalleled strength and durability. Our boards are designed to withstand pressure dents under standard use, and the closed-cell foam structure ensures that they maintain their shape over time. Every board is heat tolerant and preventive to UV yellowing.

Unlike other epoxy surfboards made with EPS foam, which often require added materials like deck skins or carbon wraps to reduce chatter, XTR boards don’t have this issue. The unique properties of our XTR foam eliminate the typical “overly buoyant” feeling that can cause choppiness or the “chatter” feeling when being ridden. Instead, our XTR boards offer a "True to Poly" feel—smooth, responsive, and stable, even in bigger, windy and choppy conditions, while still providing all the advantages of epoxy, including durability, liveliness, and responsive pop.

The foam's closed-cell structure is 100% waterproof, so when a ding occurs, there will be no water absorption into the XTR foam core, further enhancing the board's durability. This construction perfectly balances flexibility and stiffness, ensuring that your board maintains its performance without becoming too flimsy or stiff.

Below are graphics showing the construction options that we offer surfboards ordered from XTR. To read construction options in more detail, view:

✔️ Parallel Carbon - Torsional flex, most amount of spring, pop and response.
✔️ Carbon Lite - Linear flex, mimics wood stringer with a feeling of added spring, pop and response.
✔️ Single Lite Carbon - Linear flex, highly versitile, good intro to stringerless construction.
✔️ Wood Stringer - Linear flex, stiffest of all constructions and closest to PU feel.

FLEX IN A SURFBOARD: Is the ability of the surfboard to adapt to the shape of a wave with a specific surfer on a particular moment.

MEASURING FLEX: To measure flex you will need a static surfboard with the weight of a surfer. The lighter the surfer the more flex the board can have.

FLEX VALUES: Since measuring flex is difficult and extremely important for a custom surfboard, we have created Flex Values. Lightweight surfers can use more flex (8-10) while a heavier surfer 200 lbs or more would want to be in the (1-4) Range.

Learn more about Flex Value 👇

1 = Most Stiff & 10 = Most Flexible