Worldwide, Tyvek® stands for breathable, resilient, durable and water-repellant films made of 100% high-density polyethylene (HDPE). Its “secret” is the special manufacturing process, the flash-spun-bond technique. The material is obtained by spinning very finely interwoven fibers. The fibers obtain their outstanding strength through heat and pressure, completely without chemicals. That’s why Tyvek® offers a unique woven structure, more durable, more robust and with more favorable characteristics than most conventional packing materials. Tyvek®’s triumphant success, which is still unbroken to this day, began more than 40 years ago.