The RC4 110 LV BOA is a sporty ski boot for those seeking maximum precision, control, and performance. The narrow last and 110 flex provide direct power transfer and stability for a dynamic skiing technique. The BOA® Fit System ensures precise, even adjustment and optimal support, while VACUUM Fit technology adapts the shell to the individual shape of the foot. GripWalk® soles improve walking comfort and traction off-piste.