Modern technology meets traditional design ideal for everyday protection during exercise or turnout; Durable Pro Mesh outer layer is extremely strong yet flexible; Entire boot is ventilated, allowing for nonstop airflow making it lightweight and breathable; Strike area is built into the boot for improved fit and enhanced comfort; Naturally hypoallergenic inner foam lining resists mold and bacterial growth; Perfect for all horses, including those with sensitive skin; Medium 10.5 inch; Large 11.75 inch