H45 is ergonomically the correct height for a seat to be in relation to a work or dining tabletop, which is the 75h.

This chair, responsible for the entire line, has for long been our best seller. People who have it realize that its slightly more inclined back provides comfort allowing more time at the table.

Also, another characteristic is this arch that comes from the ground to the back, which can be used as a support or arm but allowing the chair to fit under the table.