I really liked the idea of the pocket for the phone, but my phone will slip out during seated leg press and a couple other exercises and then fall out of the pants completely when standing up.
Pros
Great fit, I'm a 30 waist and wearing a small
Cons
The shorts may not be suitable for all types of physical activity
I would certainly not categorize these as lightweight. The liner is very thick heavy feeling. The outer shell is also thick. They work. They are comfortable.