Neoprene wellies is a good transition boot for children. It is good at generation heat at high activities. It has a good fit and is flexsible. There are visible reflections on the heel. To get a optimally fit on the childrens foot, as a rule it must be the legth of the foot plus one finger (1-1,5cm), to get space enough to the big toe and a thick stock. 100% neoprene.