the invisible wire hair extension,lighter and more comfortable without clips ,and really easier to apply and remove without any extra help in a few minutes. | Material:100% Synthetic Japan High Temperature Fiber(Heat Resistance: 300℉-350℉ or 150-180℃ ) ;Length: About 12'' 14" 16" 18"(when it curl );Weight: About 3.5-4.2oz;Width: Approx 11";Colors tip :Color may vary by monitor,select the similar color based on your tail,it will look more naturally.Go a shade darker for a highlighted effect,a shade lighter for an ombre look ,colorful color for bright highlight,Either way, you can't go wrong! | How to Apply the hair extension and adjust the size:Please click 7th Picture in any product,a video include adjust size,apply the hair extension,and more other details. | Unlike yourself hair,the hair extension may get tangled without nutrition,use detangle spray, here is link http://a.co/7AzhZ8Q or get a spray bottle and put some conditioner in it, then fill it up with water.if no conditioner,just spray some water,It will make the hair extensions not very dry and prevent getting tangled in some extent. | After Sales :Amazon Offers the RETURN or EXCHANGE Service.If Have Other Problems Please Feel Free to Contact Us and We will Solve Them for You Within 24 hours.