Insert this cartridge in the Empty Shell (Pro 2.0) to make the perfect hair tie. Refill Length — 51 inches Loops: customizable for Any Hair Type — Cut and tie based on the length, thickness and texture of your hair. Make as little as one 4-Loop using all 34" or cutit up to make more TIYs. Certified Unparalleled Stretch and Performance — 13x stronger and 2x stretchier. than a regular drug store hair tie. TIY is the perfect hair accessory, key part of the uniform of many high-performing athletes. TIY is trusted by pro athletes around the world and will hold your hair in place through any activity or event. Why are they the Best Hair Ties? The team of athletes and visionaries behind TIY (Tie It Yourself) set out with a mission—to make a hair tie you’d actually care about and that would actually work. Our products are made of our TIY Fabric®. Softer but stronger, guarantees that you don't have to chose between performance and aesthetics. You can look good competing without having to sacrifice the health of your hair. Even if you’re not in a high-risk scenario, traditional hair ties cause hair damage and can slip, slide and snap. We created the hair tie you will use for the rest of your life. Customization Loops = Size - More Loops = More Support think of loops like sizes for your clothes. Every hair type is different, not only in its volume, but in its texture and style. TIY guarantees that you can tailor it exactly to what you need. Independently of how fine or thick your hair is, you can make the perfect loop.