Online fabric purchases are difficult to do if you have particular fiber content and specific stretch that you are seeking. General purchases are the easiest to make. Finding a stretch fabric with no specific stretch quality desired is extremely easy to do when you buy fabric online.
Depending on your sewing needs, select fabric from an online vendor that readily gives you the information you need to buy goods. If you need more fabric construction details, seek out vendors that offer that information upfront. Most vendors will list the weight of the goods, their content percentages, and the width of the goods. However, the stretch quality (whether its 4-way, 2-way, or 3-way stretch) is not always mentioned. If you need more information, ask before buying.
Most vendors give you ways to contact them. Look for the Contact Us icon on the web page. Send the question, you need the answer for and wait before making a purchase.