The Marker 4.5 is a perfect binding for the junior skier. Marker's Compact Heel is very easy for the lightweight skier to be able to step in and out of, while the Active AFD provides consistent release values even when boot soles are worn down or dirty. The BioTech Toe has adequate energy transmission for the small skier to have control as they ski and slide their way down the mountain on the Marker 4.5 Junior Binding! BioTech Toe, Compact Heel, Active AFD, Compatible with GripWalk Boot Soles, Warranty: One Year, Max Din Setting: 4.5, Binding Weight: 2.48 lbs., Recommended Weight Range: 25-109lbs, Category: Downhill, Actual Din Range: .75-4.5, Ski Gear Intended Use: All Mountain, Skill Range: Beginner - Advanced Intermediate, Model Year: 2022, Product ID: 571037, Model Number: 6120T1.MC, GTIN: 0883295307067