The conversation between human and AI assistant.
What are the difference between polyester 210T and 210D?
Oh, I see. So, which one would be better for making a backpack?
If you're looking for durability, then polyester 210T would be a better choice for a backpack as it can withstand more wear and tear than 210D. However, if weight is a concern, then 210D might be a better choice as it is lighter.