I have owned the socks for 27 months now. Each pair of socks was probably worn every 10 days. For a few months, the socks have been getting holes: on the toes, side seams and the heel. It's a shame, because they've kept their color and shape. They are washed at 40°C in the machine without a dryer. They are also comfortable to wear. But 2 years of useful life is far too little, considering the dwindling resources of this earth. Especially since the socks cannot be recycled due to the admixture.