UHMWPE is an acronym for Ultra-High Molecular Weight Poly Ethylene
ul-tra hī mo-lec-u-lar wāt po-lē eth-i-lēn
U ltra H igh M olecular W eight P olyethylene
For people who aren't fiber science nerds, this normally refers to fibers like Dyneema® or Spectra®.
Fabrics with UHMWPE fibers are known for having insanely high tensile strength. Dyneema® is touted to be 15x stronger than steel (when compared at equal weights).
Other benefits of UHMWPE include...