Simply Good An Israeli brand This is an electromagnetic wave blocking belly band. It's a maternity electromagnetic wave cut belly band. One size fits all. The color is navy. The back side is navy cotton, and the belly side is silver. The following is from the Rakuten site: Blocks 99.9% of electromagnetic waves from everyday items such as mobile phones, TVs, computers, and microwave ovens!! - In Europe, pregnant mothers enjoy fashion by wearing belly bands (belly bands) in a layered style to prevent their growing bellies from peeking out from their T-shirts. The electromagnetic wave blocking belly band was born from the request of a pregnant woman working at a brand factory who thought it would be great if the belly band had the function of blocking electromagnetic waves. - Mobile phones, smartphones, PCs, TVs, etc., are electrical appliances that make life comfortable. But for pregnant mothers, they are concerned about the electromagnetic waves emitted from electrical appliances. An item that eliminates such anxiety for mothers has arrived from Israel, a leading country in childcare goods. - The FCC (Federal Communications Commission / an independent agency in the United States that controls radio, television, telegraph, and telephone) certified testing institution has approved a shielding rate and protection effect of 99.9% against high frequencies. - Because it uses stretchy, soft fabric, it can be used in one size from early pregnancy to just before childbirth. - Weighing about 80g, it is lightweight, so there is no need to worry about the burden when wearing it. It can be worn comfortably under any clothes. - Because it is extremely thin fabric, it can be folded compactly and stored in a bag, making it easy to put on and take off when you are out. - Pregnant mothers are very concerned about the safety of their babies in their bellies. It gently wraps the growing belly and protects both the mother and the baby from electromagnetic waves, making it ideal for gifts. *99.9% block means that it demonstrates the shielding effect against "electromagnetic waves" and does not guarantee that mobile phones will not ring. Please confirm that the antenna signal disappears or is significantly reduced. Test results may vary depending on the type of mobile phone, geographical conditions, and the mobile phone company's network. Note: From the Rakuten site I bought this because I didn't want my baby to be exposed to electromagnetic waves from smartphones and computers during pregnancy, but I didn't wear it because I had other belly bands. I haven't worn it, but there is one stain. For those who understand home storage.