The sole looks securely attached and sturdy, being plastic instead of fabric, and Id wear them for quick trips outside. For the 50-60. However on asphalt the soft gripping sole which is a very big plus, must be considered to be dangerous on certain surfaces as they grip and as in todays experiences, I fell on my driveway hitting my head and face ,badly bruised and realized the sole got stuck because of the texture of blacktop, that is pebbley, due to weathering. I used to love my LG Tones, but they kept dying after just a few months. I bought 2 packs. Also as i mentioned in the title they dont have much arch support. Lovely fit Time will tell more about durability. The package says it is good for using with a computer -- NOT TRUE -- the cord is only FOUR FEET long so if your computer is on the floor or not very close, this cord is too short. I have ordered the 5 for comparison and hope that will be a good fit.