The 2021 Burton Ion Boa was built to destroy the entire mountain with effortless control. The only men's model with the dual zone high power focus boa offering an effortless tightening for a precision fit. This stiff boot is packed with tech, life liner creates a warm and supportive fit for superior control while the EST and autocant outsole offers a more natural stance and superior board feel. The burton Ion is for an aggressive rider who demands that edge to edge response.