Is wool a knitted fabric

Polyester fleece (polar fleece) is knitted. It is made in a similar way to sweatshirt material. Sweatshirt material has what is called a 'floating yarn' on one side (fleecy has these yarns on both sides), which is a yarn that only loops through the fabric infrequently so it creates loops. This side can be un-brushed (with one side like terry-towel) or it can be brushed (fuzzy on one side). This brushing technique is what makes polyester fleece so fuzzy.