The 14" Mahogany Ultra thin drum shell is made out of only 3 ply mahogany wood and is about 3mm thick.
The ultra thin shells are delivered with R-rings mounted. By using only 3 layers there's less glue used for the shell construction. This combined with the 3mm thickness brings out the true natural sound of the wood. It allows the shell to vibrate more and result in a rich natural sound of the wood. The volume is less in comparison to classic shells.