The zipper is the distinguishing detail
This title identifies a side zipper, making entry the useful starting point for comparison. Inspect how the zipper closes with your usual work sock and whether the opening remains comfortable when you crouch. The title does not identify a model code, so specifications from another NORTIV 8 zip boot should not be attached to this pair.
Size 11 versus the nearby listing
Compare this black size 11 with the linked size 9 when locating the correct offer. Both use the same side-zip description and photograph; they are size alternatives, not different levels of protection. A zipper is a useful convenience only when it closes comfortably over your normal sock.