All CRIME Surfboards are designed by CJ Nelson, and are built to be "soft-tops that work".  They are all made like "real surfboards", and constructed from shaped high quality eps foam blanks with stringers (1-3 depending on size), glassed with 2 layers of 6oz epoxy cloth (top and bottom), then finished with a textured 5mm EVA foam skin (which you should not wax), laminated to the deck.  The end result is a highly shreddable, super fun surfboard that performs exceptionally well in most conditions, and that also doesn't wear out like those other disposable soft-tops.