The Alpina AJ4 Max is an excellent ski boot for growing skiers who are first timers or more experienced on the mountain. Alpina uses a VCP (Volume Control Plate) that allows you to increase or decrease the volume in the boot by swapping out the boot boards. A Velcro Strap adds a snug fit across the shin and a small amount of rebound to help your little skier have control and responsiveness over his skis. VCP (Volume Control Plate), 4 ALU Buckles, Velcro Strap, Actual Flex: 40, Cuff Alignment: None, Warranty: One Year, Ski Boot Width: Junior, Flex: Soft, Used: No, Ski/Walk: No, Forefoot Width: Junior Last, Flex Adjustment: No, Buckle Count: 4, Category: Downhill, Ski Gear Intended Use: All Mountain, Instep Height: Medium, Calf Volume: Medium, Skill Range: Beginner - Intermediate, Model Year: 2018, Product ID: 535438, Model Number: 3E291.240