The original purofort boot. With its thermal insulation to -20c this boot offers all the features of purofort: shock absorption, durability and light weight.. Lightweight for minimizing foot fatigue. Flexible and supple for retaining ease of movement. Tear and wear resistant shaft for assuring a long lifetime. Slip resistant design for assuring safe working conditions. S5 rated with steel toecap and midsole for protection against penetrating and falling objects. Oil resistant, src rated outsole for perfect grip. Resistant to oils, fats, disinfectants and other various chemicals. Conforms to s5-ci-src safety rating. Extremely dirt repellent and easy to clean profile for maximum control while walking. Energy absorbing heel design for extra ergonomic support