Biodegradable Binder Pockets are made from acid-free polypropylene which contains an additional additive that allows it to biodegrade when tested according to the ASTM D5511. 1 inch gusset expands for additional capacity of up to 200 sheets. Hook and loop closure. For 11 x 8 1/2 document storage. Fits standard 3-ring binders. 10 per pack. Clear.