Back on Track® Human Knee Jumps, Nikki are long socks manufactured using strong, unique Welltex™ ceramic infused (polyester/elastane/nylon) material. They have a stretch, terry sole under the footbed, which makes this type of sock ideal for riders during cold weather or for active, outdoor sports persons and perfect as a training sock for all athletes, etc.
 
This model is also noted for its gentle compression effect (known to relieve aching legs, helps to increase circulation and, also, to aid in preventing the formation of blood clots in the lower limbs).  sold as a pairs.
 
Sizes:
Small (shoe size), 35 - 37
Medium (shoes size), 38 - 39
Large (shoe size), 40 – 42
Extra Large (shoe size) 43 - 45