The most comfortable and best looking strap ever! I had almost given up finding a leather strap long enough to allow my basses to hang below the waist.
The material and craftmanship is top notch. It's made from nice smooth leather. And it has just enough grip to keep it from sliding, but still without grabbing your shirt too much.
The 7 cm works great for bass in my opinion. No shoulder pain regardless of 4 or 5 string basses. I havent't tried the 11 cm version, but I'm not a fan of too wide straps. They typically look "too much" and dig in my neck.
The only negative I could come up with would be the price point. But as for value - it's well worth it.
I've been a bass player for some thirty plus years. Over the years I have been through numerous straps of various materials. This is the only strap I'll ever use from now on. I currently own three of these. All paired with Dunlops dual design strap locks. Perfect match.