Almost certainly not. I've been in a vertical wind tunnel before and taking off clothes would be quite difficult and take up a lot of your time - remember, unle

Almost certainly not. I've been in a vertical wind tunnel before and taking off clothes would be quite difficult and take up a lot of your time - remember, unless you're some kind of superhuman and/or spent your life on top of Everest, you're going only be conscious for about a minute. Taking off your shirt will also probably make you even colder than you already are, which definitely won't help with relaxation (which is by far the most important thing.)