Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Can't keep kneepads on my knees

I've tried to use these kneepads for washing floors and weeding gardens. However if I stand up or even attempt to crawl forward, the kneepads slip. I'm soon wearing them down around my calves.It doesn't matter how much I tighten the two straps, the kneepads won't stay in the proper position. The only thing I haven't tried is sewing them to an old pair of jeans. Even if I did that, the kneepads are so heavy, they'd probably pull the jeans down.Lord help a really slender person who tries to wear this product.