Columbia Toddler Powderbug Plus II Print Waterproof Winter Boot 100% Fabric Rubber sole Shaft measures approximately 6.5" from arch Boot opening measures approximately 10" around Waterproof materials and construction method Adjustable elastic instep strap for secure fit Drawstring with barrel lock closure, reflective heel logo for safety Removable 6mm washable, recycled felt liner Insulation rated -25F/32C