In the viking age, were there in nothern europe a very popular sport called glima.
In glima it is illegal to kick and hit, therefore it is called wrestling. The special thing about glima is that the wrestlers uses some special belts (like in sumo) to get a grip in each other. In the viking age the grip was in each others trousers.
In modern glima competition the wrestlers wear special wrestling attire (glimuföt), consisting of special shoes and a combination of pants and shirt with a protective cover around the groin. Each werstler wears three leather belts, one around each thigh and one around the waist, the thigh-belts being fastened by straps to the waist-belt.
The sport is still popular in Iceland.