I have a home gym with weights (including the 45lbs weights). I bought these mats because I didn't want these weights to accidentally cause damage to my tile floor and carpet. They have been doing their job nicely, though if weights sit on these mats long enough, they will leave marks/dents on the mats themselves--I think these marks/dents are permanent. But they are still doing their job, so I am giving them 4 stars.
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