I have been issuing these belts for about a year now. They are fine for the lower ranks where the student won't be in them long (yellow, orange, maybe green) but they are not durable. Several students have ragtag looking belts that have come unsewn on the ends and started to unravel. The outer layer of fabric is very thin. These are not high quality rank belts like Mizuno or Adidas, or even Tiger Claw.
Get something better for your browns and black belts. These will be junk before they;re done with them.