Mail lite protective postal bags are lined with Aircap bubble material with a special air retention barrier to seal every bubble against air loss for high performance cushioning. Mail lite are easy to write on with label adhesion.All Mail lite bags have a self seal strip on the lip after filling remove the release tape and fold over the flap to make a permanent seal.Each envelope has a unique tear strip for quick and easy opening by the recipient. Mail Lite Bag – C/0 – 145 x 205mm (CD).