I am 62 years old. When I'm not in a wheelchair, I crawl around the house on all fours. The Velcro is very convenient and fast for me. I carry my pair with me to go to the bathroom, on the floor next to my computers and so on. I use them on my hard (like cement) tile floors and it feels like a soft carpet! I would rather crawl than risk my unsteady gait and fall and break a bone! My neurologist said it was better than falling and my knees didn't hurt with knee pads. I don't even take them off when I crawl into the bath! I change them from time to time because Velcro wears out. But I use them all the time, many times a day; If you only use them occasionally, they will probably never wear out, other than allowing the material lining to roll off. I have tried all other brands over the years and keep coming back to this one. The velcro is a little uncomfortable and pinches my shorts covered legs in the summer but not enough to deduct a star. I love these things. (Since I started using them years ago, their price has almost doubled, but it's worth it.)
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