Our Foam Filler Tape is designed to make your hat fit just right. Made from soft, lightweight foam with an adhesive backing, it lines the inside of your hat’s sweatband to reduce the size by up to one full size (about 1–2.5 cm). Simply peel, stick, and adjust for a snug, comfortable fit. Perfect for anyone in between sizes, it adds extra cushioning while keeping your hat secure and in place.