Cotton bags are thicker and can be used repeatedly as compared to the single-use plastic or paper bags.
Cottton Bags
Why use cotton bags?
In general, cotton bags are larger than any other plastic bags, so they are capable of holding more items.
Since it is all natural products, it is always fully biodegradable. Not just biodegradable, they are also reusable and recyclable.
A 2011 study conducted by the UK Environmental Agency found that reusable bags made from recycled plastic need to be used 11 times and cotton bags need to be used 131 times before they are environmentally preferable to a single-use plastic bag.