BOA®, the world’s most popular fit system, has teamed up with Massi on a brand-new Super clean RXT boot built with sailcloth, X-Pac, giving the boot lightweight flexibility, without sacrificing durability. Highlighted by our proprietary Intuition heat moldable liner and enclosed around the heel and toe by FlexForm, this unique material compound creates ultimate flex, comfort, and longevity. Lightweight supportive elasticity.