Dyneema is a very strong polyethylene fiber. It is water repellant, UV-resistant and for the most important point : lightweight. For comparable weight, Dyneema is 15 times stronger than steel. You can find Dyneema is different forms : ropes, composites fabrics made of 100% Dyneema (like our ct5k.18) and traditional woven fabrics with additional Dyneema fibers in the warp and weft directions (like in our ripstop Dyneema). It was previously know as Cuben Fiber and you can learn more about it on thedyneemaproject.com.
VX21, also known as Xpac
Made by the sailcloth manufacturer Dimension-Polyant, VX21 is a laminate fabric. The four layers combine to create a durable and waterproof fabric. The top side is composed of woven nylon for abrasion resistance and water repellency with a DWR coating. The X-Ply provides dimensional stability and tear strength. A PET laminate adds additional waterproofness and is protected by a 50D polyester taffeta backing.
DuPont is the creator of Tyvek. Between fabric and paper, Tyvek is actually a non-woven polyethylene. The fibers are distributed randomly, compressed and assembled by thermal process. In practice, the Tyvek is very resistant to water, it is almost tear-proof and very light. It offers great possibilities for printing. Learn more about Tyvek brand.