Can?t speak to duration or anything beyond my short test drive. Reasonably priced and fast delivery from Amazon! So yes, these are marketed for kids, but for women, or people who dont have giant heads, these are great. Curious as to why a thin blue line and children with a $ are included with this ?black lives matter? set?Just doesn?t sit well with me I had Birks back in my 90s rave days and was so excited to see the style back. I ended up returning the whole thing. They are a bit on the tighter side but you would not want your shoes to slip of in the water. Hope this helps good luck Wedge is perfect height, as i age the ?stilleto? heels are uncomfortable and i worry about losing my footing. cost The room in is unreal .