I was tempted to give it 4 stars, but that's not fair. I have a vinyl plank floor in my home gym and this thing slides like it's on ice. I reached out to U4C, and they are working on a solution, but don't have one yet. They did recommend Gorilla pads from Amazon. That solved the problem with it and my floor.

What separates this from a home made or any other calf block I'd be tempted to buy is that it's rounded. You can get a serious stretch without your foot slipping off. I could have made a normal looking squared block for $20, but I'm glad I bought this instead.

The build quality is outstanding. I can't imagine it ever getting damaged by anything. If the grip tape wears out in 10 years, you can get new grip tape for a few dollars.

Great Product

Great stretch and compact size. What’s not to love?

A+++ , great addition to the gym. Looking forward to your future products.

This will hopefully be my final calf block. I can finally get enough stretch without my heels touching the floor and my feet do not slip.

Easily the best calf block on the market. Everybody loves it. You can’t go wrong. If you’re on the fence, just get it.

Absolutely amazing product highly recommend. Well constructed and made in America 🇺🇸. What makes it great and sets it aside from other calf blocks on the market is that this one CURVES giving you maximum calf muscle contraction. The grip tape also prevents slippage and maintains your balance. You want to slab muscle mass on your calfs this is a must have fitness tool.

This has to be the most well-designed calf block EVER. I'm not joking. The curve is brilliant, and the added grip tape makes your calf lifts much more effective. The curve and the grip allow you to go really deep and get that stretch, even with weights, and not worry about slipping off, which I can tell you from experience, always happens with square/rectangular blocks with 90 degree edges. I was skeptical at first because they were out of stock, but I emailed them and they responded right away. Trust me, if you're on the fence, you will not regret buying this. It will be the last calf block you will ever need to buy.

These paired with the calf block are the best way to hit your calves at home, and the best part is they don’t take up space like a dedicated calf machine does.

This thing is awesome! While we have the ability to use it with a functional trainer or Mammoth belt squat, we mostly use it on a Speediance Gym Monster. It fits the platform perfectly! This thing is very beefy, just what you want to get a deep decline stretch to work those calves. Great design guys, we couldn't be happier!

The block is very well designed. It is quite stable doing heavy raises in a Smith machine. Curvature feels great and surface has excellent friction. Excellent addition to my home gym!

I recently started using the Ucups for standing calf raises, and they’ve been excellent. They’re stable, well-made, and let me train both legs at the same time with proper weight. That’s a big improvement over my old setup, where I had to do one leg at a time while holding a dumbbell or kettlebell in one hand and trying to balance with the other.

Overall, a very practical and efficient tool. Glad I added them to my setup.

After 15 years of exercise, this is by far the best calf raise platform/accessory I’ve used. The curve allows for fantastic range of motion without slipping or discomfort.

Thanks for the calf riser. Love it.

Recently purchased the calf curve and it has exceeded my expectations. It is solid and very sturdy and the surface has a texture that allows your shoes or feet to grip without slipping. For less than $100 you have a great exercise device. Other calf blocks on Amazon or twice an amount and do not appear to be nearly as good. This is such a bargain