I dove with a Viking Drysuit made of heavy shell for 15 years. The rubber lasted the seams didn’t. It had a lot of use until it wasn’t worth repairs anymore. I replaced it with a cheaper shell drysuit that was lighter in weight. After about 5 years of wreck diving it is still water tight. Works just fine and keeps the water out. The cheaper lighter weight fabric suit is much more flexable and comfortable. The shell keeps ya dry. The undergarments is what keeps a toasty. I would go with the cheaper lite weight dry suit again when this one wears out. So far so good. The back entry is much more fitting and streamlined. The front entry has a lot of material that folds over in the front so you can get into the suit. That makes you have some extra drag threw the water. Hope this helps. Mike B.