Replaceable parts
Short answer
You can replace the strap, silicone case and front grille on your Marshall Willen II speaker.
To remove the fastening strap:
Unhook the lower part of the strap.
Pull on the strap to stretch it over the pin on the top left corner of the speaker.
To put the fastening strap back:
Position the hole in the strap over the pin on the top left corner of the speaker.
Gently work the strap around the pin until it's fastened into position.