Our Stretch El Dorado bracelets are constructed using the traditional 3x3 chainmail weave and anodized aluminum rings and EDPM rubber rings. The aluminum contains no lead or nickel and EDPM rubber no latex, so they are hypoallergenic. They can be ordered in a wide variety of colors or you can contact us to do custom colors. Since they stretch they do not require any other findings and so are easy to take on and off. 7.5" is the standard length for these pieces but if you need a different length just let us know.