I got this at about SGD$90 from REI.com. My friend at that time was based in US and got this back for me when he is back for his vacation.
So retired one, got to get one new pair out of the box to replace this.
The glue failed.....
And there is still no holes on the soles and the NIKEs are still intact
Got this new pair of orange grey as the replacement
At the back is the elastic band which is adjustable
Got to cut this useless thing away
This is better
Got to cut a groove on the heel rubber
A groove like this is nice
This is to enable it to bend back easily
The original is too hard to bend back, this will add pressure to the achilles tendon during long run
So this is ready for its virgin run