Ultra durable cleated overshoe product provides sure-footed traction on mossy rock, ice, and slick terrain. Easy On/Off: quick release buckle & strap system gets you in and out quickly. Customizable: 36 replaceable durable threaded carbide spikes per pair placed under toe, heel and ball of foot. Allows for customization and extends the life of the product. Secure Fit: molded rubber walls at toe, heel, and side provide secure fit. Traction: combination of aggressive rubber lug & carbide spike pattern provides unparalleled traction on any surface. Includes: 10 additional carbide replacement spikes & 1 buckle. Interior Dimensions: Medium: 11.25 X 4 Inches. Large: 12.75 X 4.25 Inches. X-Large: 13.5 X 4.5 Inches. XX-Large 14.25 X 4.75 Inches.