You need to own a pair of these tights
These tights are perfect for temperatures ranging from 10-15c. The compression is not as much as the Lightspeed tights but still does a superb job.
My usual runs are around 10-15km offroad trails and as the intensity of the workout increases, they do an amazing job of wicking away sweat. These tights are highly breathable in the right places. Super comfortable to wear and feels great even after a few hours of running. There is also a handy drawstring at the waist to adjust the fit.
The fit is spot on as with pretty much all of the 2XU range. So, if you have a size medium in the Lightspeed tights, you will need a size medium with the Aero tights. The quality is very good indeed and they should last for many seasons. Highly recommended.
There is a handy zipped pocket in the rear which I don't use personally. I tend to use a running belt or vest.
The only improvement I would say is to bring out a few different colour options. I would also say that if you are wearing a top of some sort, make sure it does not sit too far below the waist because there will be a build-up of sweat around the waist area. This is not the fault of the tight, more to do with the fit of the top.