I bought these for a cosplay requiring very light/grey blue eyes, and I was extremely pleased by this product. The lenses were very comfortable for 6+ hour use and I only needed to use eye drops once. They did not slide around my eye, and only started to feel dry towards the end of the day, but not uncomfortably so. The color was also perfect for what I was going for...they are not extremely vibrant, but they completely changed my eyes from dark brown to a light grey. Very effective yet subdued.