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I've found (as have users on another forum) that the 2XU are a bit too fragile, dodgy stitching in the seams. Very comfy though. I'm using Under Armour ones but have a pair of Jet Skins on order for recovery after LSRs.
http://www.bournesports.com sell skins, if that helps.
i've just bought some skins long compression bottoms and they look good but feel really odd? Is that normal? they're my first pair.
Runner bean that would be good if you can let me know,i'll probably hold of ordering them until santa's been, you never know!
Having tried skins, linebreak and 2XU I'd have to say I preferred the 2XU tights since they gave slightly better compression compared to the skins. Linebreak are cheaper but I found the sizing very large (ended up in a small without much compression).
With the tops I've gone with skins over 2XU as they are longer in the body and don't ride up so will be okay to use as a cycling baselayer.
Like I said I've been using the top as a baselayer and that's been quite effective. I've also found it useful for recovery after long swim sessions wheree the upper body is getting more of a workout. But I also get them at cost so that might tell you why I've got one!!