I guess that there is little demand because it was very difficult to find a v-neck underwear shirt for our 6 yr old. We did learn that we can order some from Hanes, but my experiences with Hanes has shown them to be a poor product in terms of longevity and cotton content/conditioning/selection.  I wanted a better return on my money so we tried the Jack & Jill 3-pack v-neck underwear T-shirt.  When I opened the shipping envelope and saw the packaging, I knew that I had made a good decision.  When I removed the packaging and held the shirts, I was wowed.  These shirts are the softest, fluffiest, and thickest underwear T-shirts that I have felt outside of the Jockey underwear T-shirts that I wear. They are such a high quality shirt that you can see the quality.  The heft of the shirt and the seam stitching are both top-notched. My son put on one of the shirts and he smilingly said "nice!". The shirts have been machine washed and they displayed minimal shrinkage.  If you are searching for a high quality v-neck underwear T-shirt for your child, you have found the right product.  With the shipping costs, the shirts are a little expensive, but this is one of those cases where you get what you pay for.