Thermal Low Cut Trainer Socks The best thing about winter is wrapping up warm, but sometimes the regular crew length sock is too constricting around the leg for everyday use when its cold out. That's why our thermal trainer socks are so useful, they offer the warmth of regular thermal socks, but in a versatile and comfortable low cut length. These socks have many great features that make them extra comfortable and great for the cold weather. Such as them being brushed inside for better insulation, keeping the warmth closer to the foot. They are also cushioned for improved comfort throughout wear, along with their arch band for a secure fit and improved comfort.