The back-zip is the classic wetsuit closure, due to the wide zipper opening on the back the entry is very easy. Depending on the model the zipper is often double lined to prevent water entry through the zipper.
 
GBS (Glued Blind Stitched)
Stitching method whereby the panels are first glued together and then only stitched halfway through the fabric instead of fully perforating it, which makes the seams waterproof.
 
ex-tech kneepads
The kneepads are made of a 4way Super-tex fabric. This is a durable fabric especially designed for protection.