Weatherproof, Tyvek by DuPont is a polyethylene fiber unaffected by water, durable and tear-resistant. Can easily be mounted to trees, fences, poles and more. Yellow background with black lettering. High visibility sign states "POSTED...PRIVATE PROPERTY...HUNTING, FISHING, TRAPPING, OR...TRESPASSING FOR ANY PURPOSE...IS STRICTLY FORBIDDEN...VIOLATORS WILL BE PROSECUTED" and also has slots for both name and address.