the halo hair extension with wire，lighter and more comfortable without clips ,and really easier to apply and remove without any extra help in a few minutes.now we have improved the product,can be adjustable the size for your head,new and old products may be shiped at random. hope everyone can understand. | Material:100% Synthetic Japan High Temperature Fiber(Heat Resistence: 300℉-350℉ or 150-180℃ ) ; Length: About 14" 16" 18"(when it curl ); Weight: About 0.22-0.26lb; Width: Approx 11"; Colors tip :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 ajust the size: click the link to watch video http://a.co/41bqMfS or choose 18" size ,16H613 Dirty Blonde ,there is a video on the 7th Picture | 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 conditoner ,just spray some water ,It will make the hair extensions not very dry and prevent getting tangled in some extent | 100% MONEY BACK GUARANTEE - Amazon offers the RETURN or EXCHANGE service. If for any reasons, please contact with Amazon Customer Support by visiting : http://www.amazon.com/contact-us/ ,If Amazon still don't help you with it, please feel free to contact us and we will reply and give you best solution within 24 hours