These PPS B4 Plain Faced 100% Recycled Envelopes will help you to post A4 forms, documents or other letters. Each envelope has an internal secretive pattern so they're suitable for use with sensitive documents. They're made from 100% recycled paper which makes them an environmentally conscious envelope choice. Features: B4 envelopes measure 353 x 250 mm so you can insert A4 documents without folding them. It's made from 100% recycled FSC certified paper. You can securely and hygienically seal your envelopes with ease thanks to their peel and seal closure. The envelopes have a secretive print on the inside which prevents the contents from being seen. Each envelope has an 80 gsm construction. These envelopes are white. This product falls under the 'Recycled Content' attribute within the People & Planet range, meaning it's made using recycled materials to ensure resources stay within the economy and away from landfill, so you can make a positive difference to people and the planet through the purchases you make.