The back strap is a lot thicker and stiffer than the old one. All in all, its a decent piece of equipment and I will use it for a few months. The heel area rubbed the skin off my heel so bad I had to wear bandaids for a few days. 4 Inches long. 6" laptop and plan to use it regularly on a 20" PC monitor. They didnt fall out unless well used (and those I relegated to at home use until I finally throw them away). Upon trying the shoes on, the right shoe?s insole was wrinkled up to the point where I didn?t even think the insole was the right size for the shoe. I settled for a pair of Sorel slippers which didnt last a year and looked ratty after one month. 5 which I would of got a nine that way they would of been a little tighter ! I have worn these flip flops exclusively for the last 4 years.