Monster Protectors Binders, album, and portfolios are the most in-demand binders on the trading card market. That's because there is no other product that matches the level of storage space and durability. Monster Protector binders also feature a custom binding that expands as you put more cards into it, so the cover always stays flush against the pages, never exposing your cards to harm. All of the pages are also stitched in rather than being glued in so the binders are incredibly durable and last for a long time.