It's hard for children to focus in climbing school when their feet feel as scrunched as a ballerina's. Black Diamond's Momentum Climbing Shoe balances comfort with performance so they can learn how to climb comfortably. Most climbing shoes opt for leather or synthetic leather uppers to keep durable throughout their rocky adventures. Black Diamond on the other hand made this shoe's upper out of a unique knit that enhances breathability without hindering overall durability. This enhanced breathability also decreases the foul smells that standard leather climbing shoes excrete in your car closet or wherever you store their climbing shoes. Since this isn't a leather or synthetic leather climbing shoe the Momentum shouldn't stretch as much as usual climbing shoes and if this is their first pair of climbing shoes you might want to consider getting this pair in the same size as their street shoe size. The NeoFriction rubber sole is also unique in that it's molded--as opposed to the usual cutting from one sheet of rubber--to the shoe in order to increase longevity and ensure traction on greasy plastic footholds.