3 X 5 US Air Force Flag - Nylon - 100% American Made Our flags are 100% American made. Certified by Collins Flags. Heavyweight 200-denier nylon Strong white headers, durable brass grommets, and reinforced fly ends Authentic seals and designs are always in correct proportion to the flag size. If you're not completely satisfied, you can send the item back for a full refund under the Amazon money-back guarantee.