A type of mock velvet fabric but knitted and sometimes stretchy - very soft.

Velvet is a closely woven fabric of silk, cotton, etc., with a thick short pile on one side. Comes in many types, qualities, and weights.

Padding used to make things thicker/warmer. Inside of coats or sleeping bags.

Fabric that is woven, like shirts and denim, instead of knitted like t-shirt fabric.