Protect your letter-size sheets with one of these top-loading sheet protectors. Made of a heavyweight vinyl, they won"t crack with age. They are closed on 3 sides with a top opening so you can insert 8.5 x 11 inch sheets without removing the sheet from your binder. Each sheet protector has a white, reinforced binding edge for use with standard 3-ring binders. Advantus Corp. is dedicated to providing innovative quality products at fair prices.