Not true panniers. I use a rack top pannier bag from Banjo Brothers. I like the bag, but there are times when it seems a little too small for all the things I'd like to pack. For the trip to the gym and office, I need to pack: An extra shirt, swim trunks, toiletries, towel, rain gear, lunch, clean undies, and personal stuff (cell phone, wallet, and all that crap). I have a little extra space left, but when I have to add something else, the bags are packed. Luckily it's a well built, sturdy bag and sturdy zippers.