TREDS: Super tough, almost impossible to puncture or tear. If damaged, the tear won't "run". Easy to pull on and off. "no right-no left"-no hassle! Better fit - Less fatiguing. Made in the USA. Treds last 6 to 8 times longer than cheap imports. The latex natural rubber formula has superior physical properties: 4000 lbs of tensile strength. 210lbs/inch of "trouser tear" strength. 800% elongation.