This Swiffer cover is one piece, with a stretchy opening and fits your Swiffer like a fitted sheet. The textured pattern on the bottom of the cover picks up the dirt and dust from your hard floor surfaces. Then the cover is easily removed for washing.

Note that this cover, as it is made using acrylic yarn, is intended for dry dusting floor surfaces. However, cotton yarn would likely be a better choice for wet use.

Skills required:
Knitting Flat
Knitting in the Round
Picking up stitches
Decrease (K2tog)
Moss Stitch pattern
Islandic Bind Off (suggested link to tutorial included with pattern)