SNAKE GUARDZ are the original ultra lightweight snake gaiter, with metatarsal protection, featuring a unique design which allows air circulation between the leg of the wearer and the Snake Guardz. They are manufactured in Nylons, Cotton, and Polyester, all with DWR water repellent coatings. Guaranteed Snake Proof, they are great for hikers, surveyors, realtors, hunters, lawn and garden use and much more. They are Made in the USA. These Snake Guardz come in various sizes including height and circumference. To determine Height measure from the top of the foot at the ankle to just below the knee. To determine calf size measure around the largest part of the calf. HEIGHT MEASUREMENTS ARE - REGULAR HEIGHT IS 11" AND EXTRA TALLS ARE 14" . CALF measurements - SIZES - Small - 5-9 inch calf, Medium - 9-14 inch calf, Large - 14-18 inch calf, X-Large - 18-21 inch calf, XX-Large - 21-24 inch calf, XXX-Large - 21-24 inch calf. SNAKE GUARDZ MUST BE WORN WITH A GOOD QUALITY LEATHER BOOT!