GoSecure Size K7 Surf Paper Mailer 350mmx470mm White (100 Pack) SURFK7

Amazon

@@@59VWrXeXGss0O6lkxkuJKxwaWO7nNz9E@@@ all paper mailers Made of paper inside and out Corrugated paper lining 100% recyclable Same level of protection as bubble-lined mailers Tear resistant Size: K7 (350 mm x 470 mm) Colour: White Pack of 100

Euroffice

Offering even more protection than traditional bubble-lined envelopes, these Envelopes are made of paper inside and out. These Envelopes feature a honeycomb paper layer between kraft paper layers.

Zoro Tools

Surf Honeycomb Kraft Paper Padded Mailing Envelopes Size K (7) 100% Recyclable Internal Size 350mm x 470mm White (Box 50) - HONEYK7