Leckey Everyday Activity Seat Mode D'emploi page 21

8.1 Backrest cushion
The backrest cushion can be attached by
simply setting it onto the backrest, then
pressing down to locate the snap fasteners
at the top. Secure it to the Velcro on
the backrest. Next, loop the appropriate
piece of elastic length over the hook- there
are 2 elastic lengths to choose from, a
smaller length for a lower position and a
longer length for a higher position.