I make these pouches to order using a double layer of faraday material inside the layers of fabric which make the pouch.  The ones in the photos are examples but fabric changes and I use recycled fabrics where possible. There is a fold over velcro fastening because it is important that there are no gaps.  Care is taken when sewing too to reduce needle holes in the fabric.  The pouches are tested and no phone signal reaches when it is inside the bag and recommended to use at night too to minimise emf frequencies during sleep hours.  Laptop bags are made to order to take one or more devices, again great to use at night. Please contact me with your desired measurements. Even when switched off, with a live battery these devices are still working away and still emit frequency.