I purchased my everyday base makeup primer along with Fasio liquid foundation at the drugstore Seki. I'd previously used Elcia's lavender-colored primer and Integrate Gracie's pink-tinted primer, but I was drawn to the 97% serum content and decided to try the plain clear white version. I thought this would be a good choice for fall and winter, when hydration is key. It's a moisturizing primer, like a moisturizing cream. It adds a glow and doesn't have any color control, but it's great for those who want a glow. It provides ample sun protection. Kose has long advocated using both foundation and primer in tandem, so this was a perfect match with Fasio liquid foundation. I plan to use this in fall and winter, and a more durable Fasio primer in spring and summer. This primer can be removed with soap or cleanser, so I felt it didn't strain my skin even after removing my makeup.