I ordered the loose fit.....i'm in a sea kayak at least 5 days a month and wanted it loose so I could use it also as a changing station (thinking getting off the water a citizens not wanting to see me strip out of wet and into dry)....and like you said it allows whatever layer(s) you have to be worn under. I think you'll like it, the hard decision will be which weight to order...and the hood is fairly form fitting.