Hi Bunny1990,
I don’t have any personal experience with any of the topper covers that are listed but your best source of guidance about any of them would be the manufacturer or retailer that sells them. They are all knowledgeable about their products.
As the article you posted mentions … a more stretchy knit cover will allow the latex to contour to the shape of your body more effectively. The tradeoff is that a woven cover can be more durable and can also provide better protection for the latex against oxidation from exposure to air (see post #3 here). There are also some people that prefer covers that are quilted with various materials such as wool (see post #6 here).
There are a few vendors that sell knit covers listed in post #4 here.
Phoenix