Theres simply no beating the combination of comfort (especially for people with glasses! The disadvantage is that past a certain point it becomes a distraction. Il a été reconnu par tous mes appareils. They last forever and the only reason I don?t wear my first couple is they are my work ones, and now get used for daily house chores and painting. The overall issue is the design or manufacturing of it is extremely poor! We can put a pair of boots on the side. In addition, are three axis of control. I should have just thrown them away and used my own. They are comfortable for long walks, perfect for summer. I?m normally about an 8 to 10 very curvy big bottom and thighs smaller waist .