One of the best things about ski and snow boots equipped with the BOA lacing system is the micro adjustability. The BOA window on these Bonfire pants allows you to easily reach the adjustment knob on your boots through an opening in the lining of the pant. The placement of this window allows for adjustments to be made without having to pull your pant over your boot, which can lead to heat loss. Look for the red thread marking this opening on all of our women’s pants from Bonfire.