AYU Sunless is a renowned and innovative manufacturer of high-quality sunless tanning products, dedicated to prAYU Sunless is a renowned and innovative manufacturer of high-quality sunless tanning products, dedicated to providing safe, natural-looking, and effective solutions for achieving a sun-kissed glow without the harmful effects of traditional sun exposure.oviding safe, natural-looking, and effective solutions for achieving a sun-kissed glow without the harmful effects of traditional sun exposure.