Muffler towel is a newly added concert good to the extra 4 dates of next month's GRANRODEO LIVE TOUR 2017 Pierrot Dancin'
http://www.granrodeo.net/news/2017/07/pd2017hanbai.php
Each fan can buy up to a maximum of 3 muffler towels per person
Both muffler towel designs are adorable but I think the Osaka dates' design stands out more