Squash Grips. They do something basic, but important — they help you hold onto your racket, even when you are sweating profusely.
Your racket will come with a stock factory grip. You can put an overgrip on top of that, to help with sweat absorption, or to increase the size of the grip and make the racket feel more comfortable in your freakishly large hands.
You can also buy a replacement grip. In this case you remove the factory grip and put on the replacement grip instead.
I generally only use overgrips. My favorite has always been Tourna Grip. Here’s a video review I did of Tourna Grip, along with a brief tutorial on how to grip a squash racket.
I don’t use replacement grips too often but I’d have to guess the #1 brand of replacement squash grips is Karakal PU Super Grip. Tons of pros use Karakal.
Picking a grip is a very personal matter. Obviously, you need your squash racket to feel comfortable in your hands. So experiment with different squash grips and see what works best for you and your freakishly large paws.
Here are some other grip brands to consider. Some of these pages have both overgrips and replacement grips.
Oh, one more thing. Want to see the grip Ramy Ashour used to win the World Championships? Sure you do. Here it is: