Click to enlarge
With the correct material choise the block gives good support, and still has a little "bounce" so it is comfortable to use even during longer sessions.
Another positive thing is that it doesn't matter if you drop it due to it's light weight.
Often used in iyengaryoga , yinyoga and even during astanga "playground"/technique lessons.
In the secon picture you can see how big this support is compared to our ordinary (A4-sized) support blocks.
made in Finland.