· Thick, flame retardant underwear trousers in wool, ideal as a base layer under a shell. · Excellent heat retention, goes with Blåkläder flame retardant jacket 4793 in the same material. ·Certified to EN 1149-5, EN ISO 11612, IEC 61482-2 Blaklader 1878 Flame Retardant Wool Long Johns Thermal Leggings