Blackburn EX-Grocery Pannier Bag: Blackburn's Ex-Grocery Pannier carries so much that it will transform your bike into your new cargo hauler. Durable 250-denier fabric is wrapped around a flexible steel frame that folds flat when empty. It easily attaches to almost any rear rack (sold separately) thanks to Blackburn's Universal Fit mounts, and there are handles and a shoulder strap for easy transport off the bike. Clever on-bike specific features include attachment points for safety lights and reflective piping for safety.