LET THE SUN SHINE IN WITH SUN-GLO! Unlike flags with sewn stars that block the light, these dyed USA flags feature radiant white stars illuminated by the bright light of the sun. Sun-Glo US flags are made of 100% SolarMax nylon for extra durability. All Annin Sun-Glo US flags are finished with lock-stitched hems, heavy duty heading and strong brass grommets.