These bags are designed for even greater strength and durability to keep heavy items secure and your most fragile ones totally intact. EXTRA DURABILITY. Mail lite plus bags are designed for extra strength and durability ensuring your mailings are safe in transit and still look good on arrival.LIGHT WEIGHT. Quality Air Cap barrier sealed bubble and covered with glazed white Kraft paper, perfect for every day mailing of bulky items.COST SAVING. Mail Lite typically saves over 30% in postal costs in comparison to traditional packaging.EASY SEAL. Peel and seal bags make packaging easy. Just expose adhesive strip and press to seal.NO MESS. No need to activate the bag The Air Cap barrier bubbles keep your contents safer, more secure. No mess like ordinary insulated bags.Tough craft outer, hundreds of tiny air bubbles. Cushions contents in transit.