Sorel Youth Flurry GR Hea Cold Weather Boot (Toddler/Little Kid/Big Kid) 100% Synthetic Rubber sole Shaft measures approximately 9" from arch Heel measures approximately 1" Boot opening measures approximately 12.5" around Synthetic Rubber sole Upper: Durable water and wind-resistant PU coated synthetic textile upper Bult-in gaiter with barrel lock closure system with fixed elastic in-step strap Insulation: Removable 6 mm washable recycled felt inner boot