When I decided to go looking for an exercise mat I had one main requirement - good thickness.
Compared to most of the alternatives I could find this one was a good bit thicker than anything else. This is 1.7 cm where most are just 1 cm.
The mat is comfortable and you can't feel the floor, even if you're a lardbutt like me at 15 and a half stone.
It's completely double sided (blue and black) and rolls up easily. There are a coupld of ringed holes for hanging it up or putting straps on it.
All around a damn fine mat and worth the extra money.