Amazon.com : Full Shine Tape In Hair Extensions Double Sided 。?Easy To Use: For Sandwich Method,Do Not Heat The Tape Using Excessively High Temperatures;The Two Pieces Must Be Aligned;Don\'t Add Too Much Hair In The Middle,These Extensions Come With A Pre-Taped Adhesive Strip,Making It Incredibly Easy To Attach Them ?Long-Lasting: The Cuticles of Remy Hair Are Better Preserved,Aligned In The Same Direction,Which Prevents Tangling And Matting,Making Them Durable And Long-Lasting;They Are Soft,Silky,Providing A Realistic Feel And Allowing For Multiple Re-Applications ?Seamless And Natural Blend: Tape in Extension Seamlessly Blend With Your Natural Hair,Creating A Natural-Looking Hairstyle And Providing A Undetectable Look;Add Length,Volume,Or Highlight,Tape Extension Give You The Flexibility to Create Endless Hairstyle ?Strong Tape: Tape Hair Extensions Are Double-Sided Tape With Strong Glue,Powerful And Hypoallergenic;They Can Be Re-Taped And Re-Applied,It Is Completely Invisible And Looks Very Natural;Just Like Your Own Hair - Curl, Straighten,Suitable for Any Occasions ?How Many Packs You Need: If Your Hair Is Thick,3-4 Packs to Add The Length,2-3 Packs to Add The Thickness;If Your Hair Is Thin,3-4 Packs to Add The Thickness,2-3 Packs to Add The Length;We Recommend Using 3-4 Packs of Tape Hair Extension for A Full Head