Commercial-grade inflatables use heavy-duty 15oz to 18oz vinyl coated nylon, seam-reinforcements, and (at minimum) two rows of stitching since they are designed for heavy wear-and-tear.
“Consumer” inflatables (sold at big box stores) often use lightweight nylon and a single row of stitching since they’re only made to be used once or twice on your own personal gathering — but watch out! Some so-called commercial grade products might have lighter-weight materials that aren’t up to the job because their main focus is making sales, not quality.