Signature is a professional, long-lasting range of high-shine gel polishes from ASP.All Season Professional is always there to provide you with the most extensive lines of quality, professional products at the most competitive prices. Headquartered in Valencia, California USA, ASP is the world leader in professional nail products and services. Just as each of nature s seasons stands out with its unique beauty and purpose, each product line is chosen with the utmost care by the ASP family. Each product represents a commitment to superior quality and affordability. Whatever the season, you can always depend on ASP.