As I have interacted with net builders over the years they report a problem finding quality "rubber" or "plastic" type net bags. These are quality bags from a major US supplier. I have found that the clear ghost net bags will stain in waters with a high tannin content (think Eastern US). I also have a black rubber/plastic bag in some of the sizes. I find that the black bags look better in photos, offering a nice back ground color.
As with all net bags, you will need to measure the circumference of the landing net hoop to determine which is the best size for your net (see picture ). These are lighter rubber net bags, made for use in flowing water. There is a disadvantage that their product life is not as long as the heavy lake style bags. These plastic net bags have some "give" and will fit net frame slightly larger or smaller. I have cut off the loops when fitting the bag to a slightly smaller frame or into a frame that has had holes already drilled in the net frame. The measurements listed are the circumference size of hoop that I find works best for each bag.
A bit of caution, if you use a string or cord to attach the net, you can cut through the material if you apply too much force. A helpful hint for attaching a net bag or a fast repair is to use a zip tie. Strong, easy and quick. Feel to contact me for questions or if you have larger order (greater 10 net bags for pricing). The measurement of these bags is an approximation, as they have a fair amount of stretch and a row of loops maybe cut off to vary the size.
40-42 inch circumference - 10 inches deep (ghost or black)
44-47 inch circumference - 12 inches deep (ghost or black)
47-50 inch circumference - 14 inches deep (ghost or black)
55-60 inch circumference - 16 inches deep (ghost or black)
70-74 inch circumference - 20 inches deep (ghost or black)
The net bags maybe selected by scrolling through size choices.