Flaps are gummed on these fine 9x4 Archival Paper (#10 size) cream Envelopes to place your Letters to the Future in - or any messages. The 25% cotton envelopes are cream in color and match the stationery "Letter to the Future" that we make. But where the other cream flapped envelopes have no gum on the flaps, these envelopes do, and they are easy to seal. Per pack of 10.