GroVia O.N.E. tips for best fit! January 10, 2019 22:26 Updated An informal GroVia O.N.E video showing tips and tricks for the best fit on the O.N.E. cloth diaper system. Related articles Getting a Good Fit With Both Soakers in O.N.E GroVia O.N.E. as a trim daytime diaper. Can I Use Diaper Rash Cream?