Booties feature a five-layer fabric compacted into 2.7mil. Laminating a high energy polymer (EVOH) with a low-energy polymer (PE) creates a fabric impervious to at least 90% of all organic chemicals for four hours at 35°C (95°F). Each layer acts as a barrier against various epoxies and industrial chemicals. Can be worn as a liner under regular boots, or as a cover over shoes or boots. One size fits all. 29 in. (73.7cm).