The Gentle Monster Tomy-G1 (or TOMY G1) is a popular, slim, square-frame acetate sunglass model known for its minimalist style, charcoal or clear grey color, and Zeiss grey-tinted lenses offering 99.9% UV protection, featuring subtle engraved branding on the thin temples. It's a unisex design, praised for lightweight comfort and versatile fashion appeal. The ZEISS lenses are grey-tinted and offer complete UV protection.