Swix Marathon is a hard and extra-durable glide wax that is ideal for long-distance racing, especially on wet, dirty, and contaminated snow. The wax contains an additive that helps reduce friction against dirt particles. It works great in warmer weather conditions, but can also be competitive in colder weather. You can use Marathon waxes as a race wax alone or as a base for top coats. Marathon Black wax has a new and improved recipe for 24/25!