The Spiderwire Stealth Braid is made Dyneema which happens to be the strongest thermoplastic in the world. On a weight for weight basis, the material used to make this braided line is fifteen time stronger than steel. The great thing about using Dyneema to make this line is that it has no stretch properties. What does that mean to you? That means that even the smallest bite will be felt on your end and with a little luck you might just take that fish home.