Putting a seat liner on a stroller does not require technical knowledge or skills. You have to place the liner on the stroller, and the other process depends upon what kind of liner you have. If it is a regular liner with straps attached to it, you have to put the liner on the stroller and tie the straps with the seat’s frame. On the other hand, some liners come with holes. You can insert the stroller’s harnesses into them while you put it down on the seat, and it’s done! Similarly, you can find many types of liners that may come with different attachment methods.