It's interesting that we all roll up our sleeves and there is no beautiful way to do that.
Invisable changable is a collection for businesswomen that needs clothes that can change to the womens' situation. The sleeves in "rest" position are offical and the sleeves in the other position are inoffical. So with one outfit she could go to a meeting and have a drink.
I used magnetes for holding the construction of the sleeves. Through this invisable way the clothes gets a kind of unexpected sophistication that fits perfectly with the classy businesswomen.