Do not use double surgical mask. Will worsen the fit. Even Medicos 4-ply also no use when fit is loose. Use cloth mask on top of surgical mask or like me, KF94 or Medicos C-fold. Both are quite cheap (Respack kf94 made in my rm30 for 20pcs) and can use a few times before throw. Sidenote: I will only use made in Malaysia mask. MIC mask too inconsistent in quality. Strap break all the time. Many places like CDC tested Chinese manufacturers mask and found same mask model different batch different quality.