Three layers bokken are stronger! The grain of the three layers of wood are crossed in order to make it ULTRA RESISTANT to impacts.

Lignum Vitae:

One of the hardest, most dense and heavy woods in the world (three times heavier and more resistant than oak), also known as "IRONWOOD". The wood is very compact with a yellow / greenish color and brownish streaks. It has a strong resistance to humidity and mold and the impact resistance is impressive.

Ash Wood:

his wood is very hard and dense, and at the same time it's not too heavy and very elastic. Along with Lignum Vitae it belongs to the Ironwood category (hard as iron). Ash Wood has a beautiful color tending to white and a very small porosity, so it's very resistant to humidity. We did many tests on this wood and the result is that its resistance to impact is the best after Lignum Vitae!