This clothes cannot work.I bought it 5 months ago, at first I put my mobile phone inside it, it can block the signal and my call cannot be reached. But after using it for 5 months, I use my mobile phone to test it again, I find it cannot block the signal at all and my call can be reached. I wish I can return or exchange it but the return policy shows I cannot return or exchange after one month. So I feel very bad and I don't suggest others to buy it any more.