Northside Icicle Boot (Little Kid) 100% Nylon Synthetic sole Shaft measures approximately 7.5" from arch Heel measures approximately 1.25" Platform measures approximately 0.5" Boot opening measures approximately 10.25" around Upper- 420D Nylon upper with gusseted full zip front closure and reflective strip on back of boot for added safety Lined with soft Berber nylon to provide warmth and added comfort Insulated with 200 grams of Thermolite insulation that provides a -25 rating Removable EVA insole with sherpa lining for added warmth and comfort under foot