Material Matters: Our straps are made of heavy-duty nylon. Beware of lifting straps made of cotton, which end up frayed and damaged under heavy weights. Know your materials. From PowerliftingTechnique.com, "Cotton straps aren&';t as durable for heavy lifting as they stretch more under load. Nylon straps don&';t stretch as much, making them an ideal fit for most lifters. Leather straps are the most durable, but they are bulky and don&';t absorb sweat." What&';s Important to You? These are competition-level lifting straps, but perfect for the gym rat who wants a quality pair of straps. We focus on quality and durability. If you&';re looking for a cheap pair of cotton straps for comfortable, low-energy workouts, perhaps these are not for you. If you want to buy a pair of quality one-and-done straps, you found your pair. Lifetime Warranty: Enough said. We&';re so confident in our wrist straps that if you manage to destroy these, first we&';ll get you a new pair, then we&';re signing you up for The World&';s Strongest Man Competition, because you are a freak.