The Aerro 5.9 Ski Boots are the ideal choice for beginning to intermediate recreational skiers seeking all day warmth, and comfort. Ultra high tech, bi-injected construction provides exceptional support and easy entry functionality. This lightweight performer features flex and dynamic control characteristics that are adjusted to accelerate skill level improvement. The Classic 2 Piece Overlap design is simple to open and close and are designed to hold the skier’s foot and leg in a strong and balanced stance position, permitting energy and leverage to be transferred from the skier’s feet and legs to the skis for performance and and control. 105mm last.