It is a soft pile fabric and it is woven in two layers. The top is made of layers using different fibres like rayon, silk and polyester. It has a plain under side and a very distinct pile on right side. Velvet drapes well. It suits simple semi fitting styles.
Flat seams should be used. Velvet is not very forgiving of holes made by incorrect stitching. Velvet has a very distinctive nap or pile and it is very important to make sure to have the nap going the same way.
The most common choice nap going down the garment. When look at the right side with the nap smooth down, it looks soft and has a shimmer.