Its features include oval-shaped knee pads, horizontal stitching across the back of each knee, a straight line of double stitching diagonally across the front of each thigh, a saddle pad at the back and heel guards behind each leg.
Morisset had created what he called a "three-dimensional jean design" that was "shaped to fit an active body", Marriott told Justice Paul Heath.
"When you look at the degree of similarity between what Jeanswest made in 2009 and what G-Star already had on the market at that time, the degree of similarity is so overwhelming that it is impossible to conclude anything other than they must have copied it from one of the G-Star Jeans," Marriott said.
"As the evidence comes out, it will be apparent how important this design that's alleged to have been copied is to G-Star and indeed to the fashion world," he said.
A number of pairs of jeans were produced as evidence and Morisset was expected to give evidence via video-link from Amsterdam last night. If needed, the court was going to sit until midnight.
The G-Star case, scheduled to run into next week, seeks a declaration the copyright infringement took place, an injunction and damages.
