BCW Current Comic Mylar Archivals - 4 Mil Comic Book Bags | Archival Polyester Storage Sleeves for Comics | Mylar Comic Bags with 1-1/2" Flap Closure

I was in the same boat, and went with these. https://www.amazon.com/dp/B000JFKSN0?ref_=icdp_ba_mweb_mb_pd_bap_m_grid_rp_0_8_gf&clientRefMarker=pd_bap_m_grid_rp_0_8_gf&heartsTeamIdentifier=buyagain&psc=1&heartDisabled=false&sbo=RZvfv%2F%2FHxDF%2BO5021pAnSA%3D%3D