Product Description MEGAComfort Industrial MEGASock, is made with 50% pure wool, 30% nylon, 15% acrylic, 4% other fibers and 1% spandex, to provide comfort and protection from heat and cold, and keeps feet dray in the harshest conditions. With reinforced heel and toes and boot length cut, MEGASock is more durable than the average sock. From the Manufacturer From the Manufacturer: As a Podiatrist, with over 20 years of practicing throughout many parts of the world, Dr. Kevan Orvitz has studied all aspects of biomechanics. His passion for understanding the correlation between the affects of biomechanics on the human body, as it relates to the lower body and feet, inspired him to create MEGAComfort. MEGAComfort Anti-Fatigue insoles and protection product line are clinically proven and field tested to reduce muscle fatigue and pain, while increasing comfort and the ability to balance. MEGAComfort was founded to promote the successful transition away from anti-fatigue floor matting as insoles provide a cost effective and personalized comfort zone for all workers stationary, mobile and those that work outdoors. MEGAComfort is built on the foundation of personal service and a commitment to its valued clients.