Updated to S.A.F material! Recommended for mid-water swimming, jig head swimming, and super fishing! Natural swimming action with stable swimming posture! When swimming with a jig head (mid-strike), the body rolls slightly, faithfully reproducing the swimming action of a real small fish! In addition to a jig head, the 5inch is also a great trailer for chatter baits! The 4inch has a great track record when used with the Supaku (surface I-stroke system)! The S.A.F material has been updated to make the Revival Shad even more "fishable". The original S.A.F material attracts fish with its smell and taste, bringing bites for a long time. S.A.F. stands for Salt (SAIT) + Amino Acid (Amino) + Flavor (Flavor).