Deepseed Swoop shorts have been proven and tested on the world swoop circuit (Michael Holmes, Atila and Lazlo Czismadia and Pete Allum). They are made mostly of strong cordura, and a little cotton canvas.
They come with the option of padding on the coccyx for those hard tailbone landings, and a spandex pocket on the thigh for storing your removable deployment systems. (Even another manufacturer's RDS will fit!!)