super tuff insoles are specifically designed for work shoes. no matter how hard you are on your work shoes this tough insole will stand up to the punishment & keep working non-stop. designed for durability with a powerful combination of technologies providing superior odour & wetness control that last for months., extra durable for work shoes & boots, destroys odour on contact & absorbs sweat, specifically designed for work wear, one size fits all, long lasting protection 4 months guaranteed