Wellies Online hope you love our girls' gumboots. We developed Welly Flexisoles because they have flexible rubber soles, so they can really jump in puddles. And we appreciate that toddlers enjoy splashing too. That's why our smaller sizes have a flexible sole in particular. These gumboots have a skid proof tread, which bends readily with each step. Whilst older children can enjoy the durability of tougher soles. Our wellies are 100% rubber and fully cotton lined.