These Vale Tudo Fight Shorts made of finest quality Ultra-durable Spandex fabric that stretches effortlessly in all directions and wicks perspiration rapidly. This fabric was specifically developed to provide the technical needs that are essential in MMA: durability, exceptional 4-way stretch, breath ability, moisture winking and comfort. Compression waist-tightening system that can be tightened without creating "scrunching or cinching" around the waist while providing a comfortable, no-slip fit. This system provides a compression style fit internally to the garment that allows the external look of the product to remain unchanged.