This is the RS Classic Tour Overgrip by Robin Söderling.
If you have used any of the thin, white overgrips that you see on the tour and the rackets of professional players, this should be your new first choice! The RS Classic Tour Overgrip has all the abilities you are used to but with even more stretch that makes it easier for you to replace your brand new overgrip. Developed by Robin Söderling for long durability and perfect balance between a sticky feel and good absorption.
The RS Classic is less sticky than the RS TrueTac and more usable for warm and humid conditions.