Inspired by Harry Potter’s iconic invisibility cloak, these real-life invisibility shields can make anyone who hides behind them disappear into thin air.

Invisibility Shield Co. is a UK-based startup that has been working on an affordable invisibility mechanism for over two years. The company recently revealed a line of invisibility shields that rely on surprisingly simple technology to make users invisible to the naked eye. Apparently, the shield uses a “precision-engineered lens array” to deflect light from the subject sitting behind the shield away from the observer. The lenses are oriented vertically to allow light from the subject to diffuse when it passes through the shield. The light from the subject’s background is refracted towards the observer who cannot see the subject hiding behind the shield.

“From the observer’s perspective, this background light is effectively smeared horizontally across the front face of the shield, over the area where the subject would ordinarily be seen,” the company shared.

The team behind the project reportedly tested a variety of lens shapes, angles, and depths, and ultimately settled on a variant that doesn’t require toxic resins that are usually used in such designs. Also, the shield relies solely on optics, requiring no power source to produce its magic. Despite being just over two inches thick, the shield weighs only nine pounds, which makes it fairly portable.

Invisibility shields come in two sizes, the standard 3 x 2 feet, which can be yours for $394, and a smaller 12 x 8 inch version priced at $64, including international shipping.

According to the project’s Kickstarter page, the invisibility shield works best when placed against uniform backgrounds such as foliage, grass, sand, and sky, but will also do the trick against buildings, rails or painted lines.

Invisibility Shield Co. emphasizes that while its creations will shield a user from view, they will not protect them against any sort of attack, as it is made from a flexible and non-rigid material used for external signages.

The UK-based startup claims to have already registered hundreds of pre-orders for its invisibility shield in a matter of days, and hopes to start deliveries by December of this year.