Foam HIGH QUALITY: Used by Professional Hatters. Made in the USA. This special foam doesn’t irritate, dries quickly and durable. EASY TO USE: Insert the Original hat size reducer underneath the sweatband. Easy to remove the adhesive backing without destroying the foam. Works with all hats and caps. GET A PERFECT FIT: Two strips can reduce about 1/2 of size and four strips can reduce ONE size. Get the perfect fit without the hassle of returning your hat! QUANTITY: 10 Pieces Original Hat size reducers. COMFORTABLE: Get the perfect fit without the hassle of returning your hat!