Hey,
Hope this is useful. I have a few of these and rate them highly! So much so that I have never had to replace one yet (I wear them as an underlayer), but I discovered that you can get on free upto the 20th November.
You have to subscribe to a mailing list to get the code. I found the link here:
http://www.shortlist.com/style/keep-...attech-t-shirt
Link to subscribe: http://www.uniqlo.com/uk/heattech-uk/
Hope it is useful.
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