The tightening issue is the belt will not slide through the buckle when tightening (which is good as it will not loosen up easily while wearing), unlike other nylon belts where the belt will pull through with effort, this one simply will not move… so, pull it tight, pull the buckle out as you feed the end through the second part… and tighten. It gives less than .25 inch so over tighten when you pull…
If that makes sense. Have to lift the buckle to feed the belt through the other side. It just happened that by doing so, it tends to hold it so it will not slip back through and loosen. Most of my other nylon belts have metal buckles so not sure if it is due to the plastic… but found a system that works.