This short has a very good appearance. It is made of especially resistant materials deemed virtually tear-proof. My spouse made with ultra trails, passes through scrub and brambles. The shorts has not moved yet. The compression phenomenon is a real plus. This will reduce the blood flow to the muscle of the thigh center allowing a significant improvement in performance and especially widely limit muscle fatigue. It is worn without underwear (it is designed with "supports pocket" to not compress the private parts), avoiding any friction and is nice when lon makes tests over several days. It remains to be tested with the wear and tear washes in time.