The mattress chosen by Shohei Otani. Hybrid 4-layer structure +1 that achieves contradictory flexibility and elasticity.
The "special three-dimensional cross structure" made of four layers of different materials further improves [body pressure dispersion] and [sleeping posture maintenance].
Furthermore, the "three-fold type" has an air cyclone with a 96% air layer built into the bottom of the urethane, which improves breathability and cushioning.