Shaft Height: Approx. 18'' Tall. Fully loaded, the Alpha Mudlite features a new innovative AirCirc system which circulates airflow inside the boot with each step, an abrasion resistant Brush Tuff exterior and LaCrosse traditional Alpha construction that provides complete scent proof and waterproof protection. Rubber cup outsole with built-in floatable non-exposed rubber midsole add comfort and durable performance. Removable EVA footbed adds cushioning for all day comfort.