i just bought new suit from sea-tec and i stayed in the water more than 4 hour with 5.5mm suit in 15 celcius degree of water without any sign of cold... i tried few off the shelf suits befor but none could fit me, so i bought one custom made 3mm for summer from Spiro (diveskin.gr) which is great suit for its price, it really do the job. But this latest sea-tec suit is the first suit which fits me off the shelf and it superior quality with very very strechy neoprene. Titaniun coated inside (i even wore it without lubrication, not recommended though), nylon camo outside, strange cutting. I guess its anatomical cutting??? no titanium coating at the edges of the hood for better sealing. Water tight seals on wrists and ankles... Really great suit, much better than any other OMER off the shelf suit i saw before and tried before...