Used it about twice after purchase＼(^o^)／ The lining is fleece material, suitable for winter＼(^o^)／ It's made very sturdy and is durable＼(^o^)／ The cushion used makes it less likely for your bottom to hurt＼(^o^)／ There's a zipper on the stomach area, making it easy to put on and take off, and also convenient for using the restroom＼(^o^)／ Recommended for the coming season＼(^o^)／ The purple color you see is not discoloration, but the effect of the lighting＼(^o^)／