The F1 is a frameless mask, available in many colors. The glass is incorporated directly into the silicone, without a disturbing frame and like almost all frameless masks, it can be folded flat for transport, very practical. It is made of high-quality, very soft and comfortable liquid silicone. The low internal volume allows for effortless blowing out and the very precisely adjustable strap buckles are flexibly incorporated into the silicone body. It is a single-lens mask with a very large field of vision.