When it comes to the day that you choose to replace the lens you might find that you want new goggles. Either a different model or a fresh new set of the same model
The two main disposables with goggles are the lens and the strap. (Also goggle foam, but quality foam should last unless it’s abused)
The lens must be replaced eventually to be sure it’s still good, it will naturally get basic scratches in use and it’s anti fog may degrade over time.
The strap is more likely to be replaced for a fancy design, but will also at some point lose its elasticity.
If you get to the point of both lens and strap getting tired then a new set of goggles is generally the most financially viable
The two main disposables with goggles are the lens and the strap. (Also goggle foam, but quality foam should last unless it’s abused)
The lens must be replaced eventually to be sure it’s still good, it will naturally get basic scratches in use and it’s anti fog may degrade over time.
The strap is more likely to be replaced for a fancy design, but will also at some point lose its elasticity.
If you get to the point of both lens and strap getting tired then a new set of goggles is generally the most financially viable