A well-maintained watch deserves a well-maintained strap. The AIS leather watch strap cleaning pen cleans, conditions, and protects any kind of leather strap, safely and easily. The Swiss-made formula contains bee's wax and jojoba oil, applied with a firm silicone brush head that won't mar the leather. Final polishing is done with the included large-size microfiber cloth. Each 30-milliliter pen contains approximately 60 uses.