The flexible hardcover. The front and back covers are flexible.
The standard grey board used in Hardcover is replaced with a sulphate board approximately 300 gsm.
In the Breflex®, in contrast to a flexcover, you can choose from different types of cover wrapping materials.
135 grams/gsm laminated MC paper, but also linen, Balacron, etc.
Spine width range of 8-60 mm. (depending on the number of pages/ paper choice)