Marker M4.5 Ski Bindings 2019, High-level features for the youngest skiers with a Din setting up to 4.5. Compatible with Children and Adult boots and GripWalk boots. Marker's 4.5 Junior bindings offer features including the 4-linkage Jr toe and Compact Jr 2 heel to the very youngest of skiers, allowing them to easily step in and out of the binding on their own. Apart from that, the binding provides great riding safety and always enough pressure on the edge.