Nantucket Bike Basket Co Portland Rear Pannier Bag Our rear pannier bicycle bags have a zippered closure on top to keep your belongings secure Contains both an inner and outer pocket to keep everything organized- the perfect commuter accessory! Attaches to your existing rear rack with 2 easy-to-use clips, fits most adult bicycles Weight limit of 15 pounds or the limit of your rack 12.5" (L) x 8.5" (W) x 14" (H)