Every core that goes into a WhiteRoom Ski is built by hand and designed specifically for each ski. We use hard maple for its strength and elasticity as well as to enhance binding screw retention. Ash is known to be very strong and highly resistant to shock. This makes it a great choice for the backbone of the core and to back our UHMW sidewalls. Yellow birch is also known to be strong, hard and for its high shock resistance. Poplar is a straight-grained, lightweight yet flexible hardwood. We use poplar to decrease core weight and for its easy shaping characteristics.