Case-it Locker Zipper Dual Binder, 2 Sets of 1.5-Inch Rings with Boosters, Purple, Binder Shell Only, LKR-Dual-02-PUR Base zipper binder with dual ring sets for the Locker System of binder-based organizers Sturdy water-resistant fabric with bound edges Perfect for middle school, high school, or college students studying multiple subjects Built-in handle and shoulder strap Binder only included in purchase - add-on pieces sold separately