[semi-extrinsic]

> You could make gloves that allow you to put your hands in -200C all day long

I don't think so. The only way you could make an object like a glove for continuous LN2 exposure, and not have it be 2 feet thick, is multilayer vacuum insulation (like LN2 dewars use). But that would not let you move your hands or fingers at all.

[Retric]

Check out polyimide aerogels, it's flexible and has ridiculous insulating properties. On top of that your hands are providing heat which makes a big difference.

Though I suspect mittens are probably far easier to manufacture as that's what current designs for -60c use. Either way you are not going to have much flexibility, but could grab something.