A walking foot on a domestic sewing machine like the Janome HD3000 can be used to sew through multiple layers of fabric. The upper feeddogs on the walking foot when paired with the metal feeddogs on the sewing machine help to even feed the layers of fabric through the sewing machine without shifting.

This foot is perfect quilting your quilts!

Attaching a walking foot is a little different than attaching a standard. Check out this video on how to attach it: