I first discovered this overgrip during a trip to nationals in Mobile, AL. As a native Californian, it was one of my first experiences playing in really humid weather. My regular overgrips would get so slippery that I was afraid I was going to accidentally throw my racket. I was able to get a pack of these perforated grips and it drastically alleviated the issue and have been using them ever since. I found that the moisture was wicking away rather than absorbing into the material. This allowed me to compete without worrying about losing my racket mid-swing. The downsides of these overgrips are that they deteriorate faster than a regular overgrip, the white ones show dirt easily, and since there are holes in the grip you'll be able to see the base grip beneath if it is a different color.