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 and keep working non-stop. designed for durability with a powerful combination of technologies providing superior odour and wetness control that last for months.,extra durable for work shoes and boots ,destroys odour on contact & absorbs sweat ,specifically designed for work wear ,one size fits all ,long lasting protection 4 months guaranteed