Men's 231 boots with PU/N (N; Np) sole UM KP KC

Special men's footwear with leather upper, including artificial leather/microfibre, insulated with internal protective composite (polycarbonate) soles, with puncture-proof insoles made of aramid and/or para-aramid fibres (Kevlar fabric), with multilayer 3-layer or 4-layer package of insulation (Um) on two-layer oil and benzene resistant, acid-alkali resistant (acid and alkali solution with concentration up to 20%), frost-resistant, heat-resistant polyurethane sole with PU/N nitrile rubber overlay (N), including two-layer polyurethane sole with nitrile rubber overlay with anti-slip inserts (Np) of injection moulding method of sole fixing