The 16 inch rubber metatarsal boot is flexible and comfortable in the toughest of work environments. Rubber metatarsal boots are often worn on uneven terrain which can lead to ankle injuries. Tingley has designed an internal support system in the critical areas of the heel and ankle to help mitigate the occurrence of injuries. Ideal Applications: Mining, Manufacturing, Quarrying, Gravel Pits, Hydroblasting, and Construction. Chemical Resistance: Acids, alcohols, bases, and diluted water solutions of most chemicals that are water soluble. Not recommended for constant contact with petroleum and oil based products.