Is it the right grip?


Hiya, i have an annoying problem with my grips, at the moment i have wilson pro overgrips and they are good for about 2 or 3 sessions, then the grip goes and the colour also goes from white to grey:mad: seeing as i am not a pro i cant afford to keep buying overgrips. So i want to buy a replacement grip but dont know which one, and the thing is, i have a really tight grip on my racket, i cant really play that well if i dont have a secure grip on my racket, so i was wondering, should i get a leather grip, will that solve my problem? cheers for any help.