Baffin Venus Snow Boot (Little Kid/Big Kid) Nylon Rubber sole Shaft measures approximately 11" from arch Heel measures approximately 1 1/2" Platform measures approximately 3/4 Boot opening measures approximately 18" around -40 degree C/-40 degree F Temperature Rating 7 layer inner boot system Por-tech microfibre and rip-stop nylon upper Warm, water-resistant multi-function boot Made of lightweight materials