Panasonic EP-MA10 Operating Instructions Manual page 49

WARNING
Before use, lift the back cushion and check whether fabric of traveling
sections of the massage wheels or of other positions are damaged.
(Even if the fabric is slightly damaged, stop the product immediately,
pull out the power plug and send the product to repair.)
If the product is used when the fabric is damaged, you may get injured or
get an electric shock.
EN19