Pack of 6 pairs of work socks suitable for use with safety shoes; the socks are available in blue, black, white and gray and in sizes 3-6, 6-9, 6-11, 9-11 and 11-14. The Caterpillar work sock has reinforced toe and heel to prevent bubbles and blisters caused by work shoes. PROBLEMS'S SOLUTION ON THE FEET: The Caterpillar Work Sock is the best solution for those who want to avoid the problems that can cause wrong socks with safety shoes such as blisters or feet. NO MORE BROKEN SOCKS: Spending a lot of money on a pair of safety shoes, without the excellent work socks, it is not recommended for the safety and wellness of the foot. Moreover you will not even break and ruin the socks that without the necessary reinforcements offered by the sock CAT would break frequently. THERMAL ADJUSTMENT: Caterpillar has therefore designed and marketed also these excellent work socks that have a very efficient thermoregulation system that allows you to maintain the correct temperature for your feet. REINFORCEMENT TOE AND HEEL: The other distinctive feature is a toe and heel protection that are reinforced for use with safety shoes with metal toe cap which, without the use of proper work socks, can ruin the socks or even worse than your feet.