Bought this about 6 months ago, and we just decided to switch over to seamless paper instead of fabric backdrops.  No stains or tears, very light use.  It takes some work to get the wrinkles out.  This works best when you can bring your subject away from the backdrop and blow out the background.  Very nice and versatile gray! 

Product description

* Made from durable muslin material * 100% cotton to absorb the light and help eliminate reflection * Completely seamless; made from one piece of material * 4" pocket on one end to hang on background support * Machine washable; allow 5-8% for shrinkage * Crimped along the edges to prevent tears * Light-weight * Easy to fold
From the Manufacturer

This CowboyStudio 10 ft X 12 ft Solid Grey Muslin Backdrop Studio Background is made from durable high quality Muslin material and would be a great addition to your studio. This is a great accessory for any studio photographer. It creates a simple background in a neutral color, which help shapes the colors of the subject of the photograph. It is made from 100% cotton to help absorb the light and eliminate reflection.

Professional quality backdrops can be very expensive so Muslin is used as an affordable alternative. It is an accessible way to make your photography look more professional for a reasonable price.

Specifications:

    100% cotton
    Completely seamless, made from one piece of material
    Comes with a 4” rod pocket at one end
    Machine washable, crimped along edges to prevent tears
    Light weight and easy to fold, please allow 5-8% manufacturing shrinkage

Directions:

    To attach background to your support system, simply slide your crossbar into the rod pocket.
    You can then let the back ground hang to provide a beautiful scene for your photos and videos.
    To help remove wrinkles you can iron on a low setting with a buffer such as a towel between the muslin and the iron. It is also recommend steaming the background just before a shoot to help minimize any wrinkles that were acquired during transit.
    Please keep in mind that no two backgrounds will be exact.  Due to being made by hand colors can vary slightly as well as the location and application of the dye.