.Description This doll hair changes from white to pink when exposed to UV light.  All our doll hair is 38 inches long. We use polypropylene only for our color change hair as nylon does not hold color change properties well or for long periods It's not quite as silky and smooth as nylon, but still feels very nice. We use poly as it will continue to glow or color change far longer than nylon.  It also glows or changes much more vibrantly than nylon hair too!  We want your dolls to glow the brightest than can for the longest time possible! Make sure to store your color change hair away from light as prolonged exposure will cause the color change feature to lessen over time. Shimmer Locks stores all inventory, both rolls and prespun hanks, in light protected environments. We do not recommend heated human styling tools, but boil perm or cold water methods are safe. Ponies/dolls shown for comparison purposes only and are not included with purchase.  Your package will be shipped within one business day of receiving payment - fast and friendly service is our priority! Please feel free to contact us with any questions about our product or its use and we would be thrilled to assist you!  Amount Required Estimates are approximate and may vary depending on your doll's hair length, style, or how thickly the plugs are rooted. Please contact us if you need help or your doll is not listed below 1/2 oz - My Little Pony (all gen standard sizes), vintage She-ra, Pippa, Dawn 1 oz - Barbie, Integrity, Sindy, Jem 2 oz - Monster High, Ever After, Bratz, Cave Club, Disney Descendants, Sasha, Brenda Starr, Gene, Fashion Styling G4 MLP 3 oz - Rainbow High, LOL OMG, Hairdorables, Tonner 4 oz - Monster High 17" 5 oz - Blythe, Disney Animators, Crissy, G4 MLP Zilla 8 oz: My Child Shipping/Returns/Feedback Domestic shipping is now a flat rate no matter how many items you purchase. Please make sure to have an updated address with eBay and/or select the correct shipping address prior to paying for your item.  We are required to ship to the address provided with your payment and cannot change an address after a sale. Returns are accepted within 30 days of original purchase.  If you have any concerns about your purchase, please contact us before leaving negative or neutral feedback. Our goal is 5-star ratings and we'd like the opportunity to make things right!  Thank you for visiting and have a fantastic day!