These bags feature a super-strong, permanent peel and seal adhesive strip on the flap and are made from 55 micron polythene. When compared to paper, polythene is an enormously strong and durable material for packaging. These bags are manufactured from recycled polythene, and can also be recycled all over again into a wide range of different applications. They are also odour free! Pair with our Label Printing Services for a personalised postal bag. Grab yours now.