They work great as most reviews say, it stretches you very nicely and feels amazing. Hurts a little the first few time but is tolerable but the more you use them and improve your form, the more you get used to it of course. It's now a part of my daily routine and it's just awesome. Just remember, it's not a magic pill and won't fix your back overnight. Use it 2-3 times a day, get a good slow stretch and over time it will increase your flexibility and blood flow and relieve muscle tension and you'll feel better.
My only issue is I just don't see these lasting very long. I'm certain they are just molded ABS plastic and while they do hold my 185lbs up, it's only a matter of time because while ABS is slightly ductile and pretty strong it is extremely prone to stress cracks which is likely why so many people have them break... I am confident one day the bigger wheel is going to snap, I just do not trust the material they used and it was a poor choice but it's also much cheaper to use than a more ideal polymer. These need to be made out of fiberglass reinforced nylon (PA6) or something similar that is much more "plastic" (as in can withstand a little plastic deformation without cracking and breaking), it needs some give and that is no doubt why many people have them break over time. This plastic will obviously just snap once it forms stress cracks which will happen with use and time because, that's simply what ABS does. I actually decided I am going to make a cross section in the center to add some strength to it. I do NOT want to fall on this thing when it does decide to snap, ouch.
I just realized now that I've said that, I remember their newer version does have a reinforced bar through it, go figure! Same cheap plastic, but at least the issue was addressed but they should all have this.
| Item Package Dimensions L x W x H | 14.06 x 13.98 x 5.51 inches |
|---|---|
| Package Weight | 3.39 Kilograms |
| Item Dimensions LxWxH | 12 x 12 x 5 inches |
| Item Weight | 7 Pounds |
| Brand Name | Chirp |
| Model Name | Foam Padding |
| Color | Black |
| Material | Plastic, Acrylonitrile Butadiene Styrene, Ethylene Vinyl Acetate |
| Manufacturer | Chirp |
| Part Number | 4P-PW-BLK-PLUS-MFN |
| Style | 4-Pack |
| Size | 4-Pack |
