M-Envelopes

M-Envelopes (or M-Folders) are smart, peel-and-seal postal cartons designed for efficient, protective packaging. Their adjustable length, width, and depth make them ideal for snugly fitting various product sizes—reducing internal movement and helping prevent transit damage.

Used by top online retailers like Amazon, these lightweight yet strong mailers include a quick-seal strip for fast packing and a tear-open strip for a smooth customer experience. Manufactured from recyclable cardboard and branded under the trusted Tenvolope name, they’re a reliable, eco-conscious solution for busy shipping operations.