At about 8 liters each these panniers are just big enough to add ample space without being too bulky. The profile is slim enough to get by on tight singletrack while also allowing full use of your dropper. Easy to access and pack, they save oodles of time by not having to deal with the Tetris puzzle of loading up a seatbag. Midride access is a breeze as well so you can access a warm layer or snack without hassle. The attachment is secure and super strong for worry free performance on the chunkiest descents.