sun glare

Just purchased a Nvidia Shield K1 for my P3P. Anyone out there find a good, lightweight, sun shield for this product or have any ideas what the best solution is for shading the screen?

The LightShield™ is designed to protect tablets from glare from the sun or internal lighting. It will also offer protection from the rain in the same way as a WeatherWriter™. It gives the user privacy, making it easier to view confidential information in public places. It is small enough to fit...