You want to protect your boat from the elements so you shrinkwrap it. But come spring, you discover that mold and mildew wormed their way in. Dr. Shrink's BioShrink has an antimicrobial coating that resists the development of microorganisms such as mildew, mold, algae, and E. coli. The cover is environmentally friendly, and the company sponsors a recycling program for shrinkwrap. It's sold in 8ml rolls measuring 20' by 100'.