Resin-8 boards feature a medium concave and are made of hardrock maple and have 8-plies. This board uses a very strong epoxy which is more aggressive than the normal water-base glue, which is the industry standard. Since the epoxy is so strong, less of it is used which makes up for the weight of the 8th ply. So, it weighs the same as a standard 7-ply deck, but is much stronger.