They are terrible - cheap, silky acrylic, baggy and just an offence to the eye. He says he is only intending to wear them round the house, but I think this says that he knows they are a fashion disaster, and thinks it is OK to inflict them on his loving family, but not his friends, and passing strangers.
I'm posting a photo - please ignore the grubby t-shirt - he wore that to do some painting.