The PerFit® Panerai Style rubber watch band is the perfect band for large case dive and automatic watches. This band is thick and durable, and requires a break-in period that can be accelerated by placing the band in hot water to help it custom fit your wrist(some divers actually use boiling water, but please use care). Wear it in good health! The PerFit® Promise: you'll be happy with the Perfect Fit or your money back. PerFit® Perfect Fit, Guaranteed.