I tried another pair, it only had one strap, weak velcro, they almost fell apart in a few weeks. I bought these, 15 lbs total, 7.5 pounds each, and I've gotta say they're worth every cent. I use them for core work 5 days a week, and they're holding up very nice after a month. The velcro is very strong and having 2 straps means they don't loosen up over time. I'm bouncing and moving all over the place for hours at a time and they stay right where I put them. The weight is also adjustable, the pouSee full review