Low temperature synthetic fibers with smooth, soft, and shiny Yaki texture. Each bundle is approximately 20 inches in length. This product is tangle free during use with no fuzzy frizzy ends. These bundles are applicable to Senegalese twists, crochet and box braids plus many more styles. You can also change style from straight to wavy or curly by dipping hair in hot water of 80 degrees Celsius or 175 degrees Fahrenheit. Traditional hair curlers, rods or straw are required for the latter heat based styles. Please take precaution to protect skins from burns when using the hot water method for styling. Each individual pack weights about 3 ounces. Full head requires anywhere from 6 - 8 bundles.