If well-cared for, yoga straps should last for years. However, as they’re made of cotton and regularly used in practice, they’re susceptible to a high degree of wear. If your strap begins unraveling or gets slack in frequently used areas, it’s time to buy a new one. For yoga straps with rings or buckles, particularly plastic ones, if you notice any cracking replace them before they completely break. If a yoga strap snaps while you’re stretching, you could risk injury from your body being jolted out of the pose unexpectedly.