The Museum's Spire Society recognizes Museum donors who have given over the years and reached a cumulative giving level of a minimum of $25,000 or made a commitment of an estate give with an estimated value of $25,000 or more. These custom polos are available for Spire Society Members who want to share their passion for the National Corvette Museum. The comfort of cotton with the versatility of performance fabrications! DryTec Cotton+ 35UPF fabrication delivers a soft hand feel with a touch of stretch and moisture wicking style that makes this an instant wardrobe staple. Left chest features a NCM Spire Society heat seal emblem. 55% cotton, 42% polyester, 3% spandex.To view size chart click here.