HF Pro Closure System maximizes convenience while boosting stability and control; HF Pro closure system can easily be adjusted to fit a variety of foot and lower leg shapes; Adjustable Cuff Profile allows skiers with high volume calves to increase the circumference of the boot's upper cuff by up to 8mm; Gripwalk soles offer both sustainability and versatility while ensuring exceptional grip and stability across all terrains; HF line presents the Easy Entry Shell, a system which allows the boots to open 40 degrees, so your foot slides right in; Infrared Technology releases pressure from sensitive areas and bunions; PrimaLoft insulation retains its insulating and lightweight properties for warmth and comfort, even when wet