An invisibility cloak built for a mouse could hide warm bodies from predators with thermal vision (in this case crotaline a boid snakes), and could scale up to hide humans from heat-seeking missiles.

Reference

Shen, L., Zheng, B., Liu, Z., Wang, Z., Lin, S., Dehdashti, S., Li, E. & Chen, H. (2015) Large-Scale Far-Infrared Invisibility Cloak Hiding Object from Thermal Detection. Advanced Optical Materials. Article first published online: 21 SEP 2015. DOI: 10.1002/adom.201500267.