The Kids' Merino Boot Sock Cushion has been discontinued. If you're looking for something new, check out the best hiking/backpacking socks for 2020.
Mountain Gear says:
Make their days on the trail as fun as possible by making sure that they're comfortable from their toes to the tops of their heads, and start with the Kids Boot Sock Cushion from Darn Tough. Crafted with a blend of Merino wool and synthetics, they keep young feet happy with a sweat-free, non-bunched fit.
Historic Range: $8.36-$35.95