I was surprised at the make up of this shed.  I expected the walls to be a molded plastic, but instead it was a corrugated plastic.  I was concerned about the ruggedness (or lack there of), but after having the shed in use for over 6 months, I am very pleased.  It held up well through the snow storm of 2016.  so far so good.  It was perfect for the space I had available and it even matched my house colors.