After reading a lot of the negative reviews on here, I have to say I disagree with most of them, this product is made of metal and the pieces that keep it together are plastic yes but they are extremely sturdy. And he has already recommended them to several friends. This is miss advertised You get used to it quickly though and you stop noticing it within a few minutes. I bought these in a size 11 to fit me. Will update after hearing from Yakima. The material is lightweight and comfortable. A happy customer in this department! Ill update should that change. Excited!