Century Boost On Instruction Manual page 40

5
The seat back pad is held in place with 2
attachment tabs.
To remove an attachment tab, pull the fabric near
the attachment tab diagonally toward the center of
the base, then lift the fabric away.
Machine wash pad in cold water with gentle soap
on delicate cycle and drip-dry. DO NOT USE
BLEACH.
To put the seat base pad back on, reverse preceding
steps.
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