These Thin, Narrow, Lightweight, Heat Resistant Polyester Fiber Strands Can Be Washed, Cut, Curled, Flat Ironed Or Blow Dried. Like With Any Tinsel They Can Slide Out Of Your Hair If You Dont Tie Them Well Enough Or If Your Hair Is Super Fine. It Does Take A Bit Of Practice But Once Mastered You Wont Regret The Time Spent. These Are Super Fun To Wear! How To Apply: Step 1. Create A Slip Knot: Select A Strand Of Hair Tinsel And Create A Small Loop. Pull The End Of The Tinsel Through The Loop Completely. Step 2. Tie The Tinsel And Hair Together: For Fine Hair Select 3 Or 4 Hairs (For Thicker Hair-1 Or2) Slide Slip Knot Onto The Hair. Pull Tinsel And Hair Side To Side Direction, Making Sure The Knot Is Close To The Hair Shaft. Tie The Hairs And The Tinsel Together In A Knot. Once The Knot Is At The Base Of The Hair Pull It Tight. Now You Can Drop The Hair Pull The Ends Of Tinsels In Opposite Directions Until Knot Is Secure. Try Pulling Tinsel Holding It Closer To The Knot (To Prevent Tinsel Stretching And Breaking) Step 3: Tie Few More Knots With The Tinsel Only. The Finished Knot Should Be At The Base Of Hair, Small And Flattened Into The Hair.