Pro99 Filter Refill sheets (USD)

Items included:
5 pairs of Pro99 Filters sheets
Instruction Manual

(require Pro99 filter unit/frame and Totobobo mask)

Pro99-filter can be used for up to 1 month. New, unused filter remain effective for 3 years within the package.

More info:
https://www.youtube.com/watch?v=wr_6KQCbGHM&t=3s
https://totobobo.com/blog/2017/11/totobobo-pro-the-best-filter-for-running/
https://totobobo.com/blog/2019/11/awesome-pro-filter-from-jorge-bogota-colombia/