The blue Sport Fucker Liquid Silicone Muscle Ring is by far the most comfortable silicone cock ring on the market. The design is thick enough not to cut into your skin, but not so wide and thick that it's bulky. However its the all new silicone material used to make the Muscle Ring that makes it so comfortable. You just have to feel it to understand - words do not do the material justice. The all new silicone is silky and firm and stretches to fit any man's junk It can be used as a cock ring or a ball stretcher too! This is the blue version.