The Thumb-Saver™ is designed to be worn under a roping glove. Before use, to maintain firmness and to conform somewhat to the shape of your thumb, wet the Thumb-Saver™ thoroughly, rope the dummy extensively, let it dry, do not use wet, do not dry in a MICROWAVE OVEN. In hot climates when one perspires and get the Thumb-Saver™ wet, let it dry before using again. LOOSE - NOT TIGHT, IS THE PROPER FIT FOR THUMB-SAVER. It is recommended that one have two Thumb-Savers and alternate the use of them. The Thumb-Saver should be replaced if worn or damaged.