Had this suit for 2 1/2 years looks like new (well rinsed after every session) 5/4/3 with optional hood. With thermal rashie & shorts used on east/north east/ north scottish waters in 2 winters - fine for 4/5 hours in the depths. I was a bit sceptical of o'neill at first, with their being a member of the o'billa reefsilver group, but have no complaints re their claims and quality- will buy again. Tried a mates new 5/3 psycho and preferred my mutant and my ££ saving.