Smotherbox face farts

Description: The smotherbox has to be one of my favourite devices i mean who wouldn't love it? my slave has no option but to breathe in all of my farts. i have the head clamps tight and the cushion up high so he literally couldn't get any closer to my farts. i have no mercy in this one making him swallow and sniff every on in. i wouldn't want to waste them right?