My daughter wanted the envelope necessarily have. After a faulty delivery (however was my fault) was sent free of charge the right sleeve, the wrong bag I could keep. I so do not expect great service. Ok is just pure plastic, is at the price but fully ok and I also expect so. I can not say anything because she's only 4 weeks in use on the shelf. The important thing is my daughter is very happy with the "Case Bag" !! Delivery Dei has about 10 - 12 days lasted (The bags come from China, I believe)