Terskei, operated by O.B. Terskei S.L., is an official distributor of Respro products, offering protective masks, a filtered scarf and replacement filters. Its range is designed for people seeking to reduce exposure to dust, pollen, irritating particles and unpleasant odors in different settings, including outdoor sports and city environments.

Products include the Sporsta mask, which combines HEPA-type filtration with a lightweight Neotex design for outdoor sports where non-toxic dust is present. The City mask uses a Dynamic ACC filter developed for dust and odors associated with vehicle emissions. The Techno mask combines a HEPA filter with activated carbon, while the Allergy model is intended for pollen and allergies and offers particle, chemical and submicron filter options. Cinqro is aimed at people who run, train or participate in multiple sports in urban settings. Ultralight uses breathable, four-way-stretch fabric for warm conditions or indoor work. The Bandit scarf incorporates a DACC filter around the breathing area. Terskei also offers replacement filters and provides contact details for customer inquiries.