Compression clothing is really popular right now, runners and triathletes seems to have taken them in completely. I have a pair of Skins Travel&Recovery which I use infrequently, and they feel very comfortable when your legs are toasted from long and hard training and racing. When it comes to their efficiency, I think they might be a part of recovery, but probably quite small compared to everything you can do to recover properly.
--- non-racers. the emptiness of those lives shocks me ---
I always wear a longsleeve Under Armour 'Heat Gear' top in the gym. Main reason for wearing it initially was that it stops me getting friction marks on my arms from my gymnastic ring straps without getting in the way like a baggier top might do, plus I reckon it could help prevent niggles so why not?
Also in the sumemr it's good 'cos it absorbs most of the sweat. Plus it makes me looks quite hench
This is the main reason I was thinking of getting one, what colour do you think makes you look the most hench? Black would be the obvious answer, but I have a feeling a white top gives more shadows which makes the curves look bigger, like with white underwear.
"A wise man once said, "It's easier to buy smaller clothes, than to put on 5kg." ... Buzz
Lets be honest it's the main reason anyone wears anything that tight.
My top is black, but that was mainly so it wouldn't get too dirty (apart from chalk obviously, but that brushes off easily). I think a white top would get mucky pretty quick, therefore perhaps grey would be optimal?