Not unlike a 2x4, the advertised 2” wall thickness is merely a nominal figure whereby 2” camper wall thickness is actually at 1.5”, but still good and not to be dismissed…
The premium exterior siding product is made by Lamilux (particularly Lamilux uber glossy 4000), used by Eagle Cap and Adventurer (superior to Filon, especially so of Filon atop luan…).
https://www.lamilux.com/composites.html
Also Azdell is a top-tier composite product totally unrelated to cheap Luan, and is unaffected by moisture.
https://azdelonboard.com/
3 tons