Protective sleeves for portable electronic devices are provided. More particularly, embodiments relate to a protective sleeve that is capable of protecting a portable electronic device enclosed within from multiple environmental effects, including heat, cold, water, and impact forces from being dropped. In embodiments, provided is a protective sleeve comprising: an outer layer of material with a reflective surface; and an inner layer of material with a protective surface; wherein the outer layer of material and the inner layer of material are layered together and configured to receive a portable electronic device. A thermal masking material and products thereof which can be used in a variety of applications where reduced visibility and heat detection is desired such as military, law enforcement, and hunting are also described.