These Plus Fabric envelopes feature durable 120gsm bright white paper and a simple peel and seal closure with Power-Tac adhesion for a quick, strong seal. The envelopes also feature a convenient easy open tear strip and address window measuring 100 x 40mm. These C5 envelopes are suitable for unfolded A5 documents, or A4 documents folded once. This pack contains 500 white envelopes.