Grip Type And Size
Ideal grip type (material) and size allows proper release of the golf club and less tension in the player’s hands and forearms.

A light touching of fingertip to thumb-pad on top hand (glove hand, will indicate the correct size grip.
Too Large:
Fingertips are separated from heel
 of the thumb-pad.
Fingertips lightly touch heel of thumb-pad
Too Small:
Fingertips dig into heel of thumb-pad.

The material of the grip is a personal preference. The grip should be comfortable and playable especially if wet from rain.