First let me tell you that living in a big city, with no car, public transportation unsafe and dirty, cabs and Ubers way too expensive - my pedal and ebike are my main source of transportation and recreation year round! I use my bike like a donkey! Groceries, cat to vet, art supplies, on-and-off road trailblazing, day camping supplies and creature comforts. I have tried for years to find creative solutions to transporting everything:I NEEDED A MIRACLE PANNIER OR BASKET THIS ONE IS PERFECT!!These particular panniers allow me to add even more carry space to the top of the bike rack like an extra battery or folding chair for beach (see pic). Folds flat. Opens big and wide or adapts to smaller fold when you have less stuff inside. Can store one inside the other, relatively light weight but sturdy. I can really pack these with a LOT of heavy stuff and they keep their shape so far. GREAT warranty! See the special gift care inside to extend that for another year. Can transfer these between my ebike and pedal bike racks fast and easy. Sometimes I just use these to pick up a few groceries without the bikes. Can add just one or both bags and remove easily just by lifting no screws or zip ties, but these stay on securely. Carry handles and over the shoulder straps perfect for shopping in-store then right to bike and inside home -- no need to repack. Easily washable. Inside liner bag if needed. Soft enough that if I brush against a person or doorway they have some give and don't scratch surfaces. See-through so I don't have to dig through a heavy backpack to find what I'm looking for and because they are see through sturdy mesh, I also breeze through security police/guards when boarding trains to take my bike out of the city to day trip.The designers of these WoutWurx are brilliant and deserve an AWARD!!