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Gels are materials composed of a three-dimensional crosslinked polymer or colloidal network immersed in a fluid. They are usually soft and weak, but can be made hard and tough. Hydrogels are gels that ...

As a longtime hot sleeper who’s spent countless nights kicking off the covers, I know that the changing seasons don’t bring relief—even as we enter fall and winter. Because I’m keenly aware of the ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Melanie Pinola If you’ve ever had a pen mysteriously wander away from your ...