X-Dni Vreuls Sp. Jawna is a sports sales and marketing company. X-Dni imports in Poland the sportsbrands Masita, Sportdoc, Sportquip, Sells and Hunter. X-Dni coordinates production of tailormade sublimation clothing. X-Dni represents the company Sidijk B.V. in Poland producent of Airtracks and Padding systems for ice skating Tracks X-Dni provides management for professional sporters (a.o. Natalia Maliszewska silver medalist WC Shorttrack 2018 on 500 mtr).