It's very common for patients to develop hypoglycemia when they are being treated for diabetes. Severe hypothermia can cause fatigue and weakness. The lack of heat leads to a loss of energy as the body tries to conserve. By the time hypothermia is bad enough to cause fatigue, it is a severe medical emergency.
Zyl eyeglass frames Zyl is the most common plastic frame material because it can assume a large array of colors, textures and patterns. Temples and frame fronts can be cut from blocks of zyl extruded as a sheet of block acetate. Or, granular zyl can be liquefied and then injection molded.
RE: What is the Glock frame made of? Glock does not publish the material, claiming that it is a trade secret. There is anecdotal evidence that it is DuPont Zytel brand glass-reinforced polyamide 66. Glock competitors Smith and Wesson and Springfield state that they use Zytel, which is useful comparison data.