Check the listing for details. Respro® Sportsta™ Replacement Filters (2-Pack). Condition: New. Listed at 29.99 USD. BRAND NEW, SEALED. The Sportsta Filter Pack contains two replacement filters for use in the Respro® Sportsta™ Mask as well as the Repsro® Ultralight™ Mask. The Sportsta™ filter has sub-micron filtration capability and is usable in both countryside and urban environments. This sports hepa-type filter is able to trap particles less than one micron in size (sub-micron) and is more than capable of the removal of PM2.5 respirable particulate matter found in both urban environment. Features HEPA-style sub-micron filtrationLeast breathing resistanceBest for aerobic activityCan be used in any Respro® Mask of same size Respro® Masks are the best in the business. Please do not hesitate to reach out with any questions you may have. Check out our other Respro® Mask listings. Stay Safe, Strength & Science