US Flag Store Michigan 3ft. x 5ft. SpectraPro Flag Michigan 3ft. x 5ft. SpectraPro Flag 100% Spun Polyester 2-Ply Construction Makes this the Most Durable State Flag on the Market. These Flags are Ideal for Extreme Weather Conditions. For Use in High Wind Areas and Daily Flying Strong Header and 2 Grommets for Outdoor Flagpole Use US Made. Printed Design.