The ELCO Couvert Proclima C5 is a window-left envelope in C5 format, supplied in a box of 500 pieces with a wet-glue seal. Made from FSC-certified recycled paper and certified under the Blue Angel environmental standard, it combines reliable everyday functionality with sustainable sourcing.
Window-left positioning ensures the recipient address shows through clearly from the contents inside
Wet-glue seal provides a secure, tamper-evident closure for every envelope
FSC-certified recycled paper supports responsible forest management and reduces environmental impact
Blue Angel certification confirms low emissions and environmentally responsible production
What sets the ELCO Couvert Proclima C5 apart
The Proclima line is designed for high-volume mailing and office correspondence where consistency and quality matter. The C5 format fits standard A5 documents and invoices without folding, while the window-left layout streamlines the mailing process by eliminating the need to print or write the address on the envelope.
Ideal for...
Office administrators, mailrooms, and businesses handling regular outbound correspondence. The 500-piece box size suits teams that process high volumes of letters and invoices on a daily basis and need a reliable, always-available supply.
Application of ELCO Couvert Proclima C5
Insert the document or invoice into the envelope with the content facing the window
Ensure the address is fully visible through the window-left opening
Seal the envelope by moistening the glue strip along the flap
Sort and dispatch as part of your regular mailing process
ELCO is a Swiss manufacturer of office and mailing supplies, specializing in envelopes, packaging materials, and paper products for commercial and institutional use. The brand focuses on functional design, environmental certifications, and consistent quality for high-volume business correspondence.
It is a C5-format window-left envelope designed for office correspondence, invoices, and standard business mail that requires a clear address window and secure wet-glue closure.
Each box contains 500 pieces, making it suitable for offices and mailrooms with regular high-volume mailing needs.
The envelope is made from FSC-certified recycled paper, which is certified under the Blue Angel environmental standard for low emissions and responsible production.
The envelope uses a wet-glue seal on the flap. Moisten the glue strip with water and press the flap closed for a secure, tamper-evident seal.
The window is positioned on the left side of the envelope, allowing the recipient address on the enclosed document to show through clearly.
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