Sigma Skincare Brush Set Each tool in the Sigma Skincare Brush Set ($41) is designed to help you apply your masks, moisturisers, and serums without pulling the skin too much — just like an esthetician might use at a spa. It doesn't hurt that it's also a more sanitary form of application. Image Source: shop.nordstrom.com Sigma Skincare Brush Set $41 from shop.nordstrom.com Buy Now