The construction of the Bubblebagz product prides itself on the supreme and expert workmanship on all of our class leading products. Each product is constructed using outer paper manufactured in Finland and offers excellent GSM weight and is waterproof. The Bubblebagz Range is manufactured using the latest techniques on a specifically designed Bubblebagz production line - assurance of class leading design quality is guaranteed. Inside the outer paper the product is a very high specification bubble film using air bubbles of 10mm. What makes the Bubblebagz product class leading is that we dont just use one layer of bubble protection we use two. This is what makes our product anti tear. Bubblebagz is easily able to state its class leading product is by far the highest quality bubble bag on the market for your postage needs. But please dont take our word for it - try it for yourself! All our Bubblebagz have a self-sealing strip on the envelope lip with a peel off cover. When the cover is removed and the lip applied to the envelope - the envelope is fully sealed. Self-seal bags make packaging easy. Just expose the adhesive strip and press to seal. Our products are manufactured to be larger than our competitors - when you take into account that we are also more competitive on prices than our competitors. It makes buying from Bubblebagz a must. As our products are so light weight you wont get charged anymore for postage you just get free postage space