I sweat A LOT, and in squash, by about the third game, the loss of grip is significant. The RESINPAD makes all the difference. Only one side of the pad is porous (the side without the RESINPAD on it, IIRC). Wipe your hand and racquet grip with a towel, then manipulate the RESINPAD with the porous side facing your palm, and you feel the lightest flurry of powder fall onto your hand. It's remarkable what a difference this thing makes.