The lining and slip pocket are 100% cotton. It has 1 layer of cotton wadding and 1 layer of polycotton inside so it feels lovely and thick.
The bag measures approximately 12.5" along the bottom, 16" along the top, and 15" high with a 3.5-4" gusset. The handles have a 15" drop and are enough to fit comfortably over your shoulder. They also have 4 layers of cotton and one of cotton wadding and are double stitched down each side.