- Weight loss pants accelerate the flow of sweat: The weight loss neoprene pants for the sauna are made of a 3-layer breathable composite material. In addition, the high waist design offers complete coverage of the abdominal area and good control of the abdomen and thighs without constriction or obstruction of movement. The breathable neoprene sauna effect rapidly increases the body temperature, so you sweat twice as much when running or working out.