This is life saving. Whenever my calves hurt or tight, I put them on for a while and it goes away right away. The label inside is a bit annoying and looks weird, but it has to be put somewhere.
Pros
First pair of compression boots and I love them! I'm 5'7, 130lbs and I wear XS. Fits great.
Cons
May not be suitable for those with calf injuries or medical conditions.