Overpants: The black ones are very stretchy. I think they were a sample without a tag, but I believe they are also from BONAS. I bought them for a family member's child, but they were stored for several years without being tried on. Haha. How about them for a junior high or elementary school girl? I think the material of both is quite good. The knit ones are soft and seem easy to wear, even for adults. Because they are high-waisted, they are also good for keeping your stomach warm.