Here's the kit I'm checking out...
Lululemon run swiftly tech racerback, £42
I want to do yoga outside like this... Lululemon open your heart tank £52
Lululemon 'The mat' £62
Astro wunder under pant £82
Yeah, it isn't cheap. But this kit is awesome, I've already got some Lululemon clothes and I can genuinely say it is worth the money. Obviously, it's only worth it when you exercise a lot though!
There's only a couple of stores in the UK so far - I went to the one in LA (get me!) - but am hotfooting it to London soon to check them out!