Cougar White A8 Envelopes (5.5x8.125 Inches) 250-Pack - Premium Large Invitation, Social & Announcement Envelopes for Weddings, Parties & Business Correspondence | PaperPapers

These are not Cougar stock. They appear to be a house stock. They are thin and uneven density (i.e., look splotchy if you hold them up to the light). They would be fine if you just need an every-day look and feel. I returned them.