Hygroscopic

Hygroscopic means that something likes to absorb water or moisture from the air around it. Imagine if you have a sponge that is always thirsty and wants to drink up any water it can find. That's what hygroscopic materials do.

For example, salt is hygroscopic, which is why you might find clumps of salt in a salt shaker on a humid day. The salt absorbs moisture from the air and turns into little clumps.

Another example is the silica gel packets found in new shoes or electronic devices. These little packets are filled with a material that loves to absorb moisture from the air, which helps keep the shoes or the electronics dry and fresh.

Overall, hygroscopic materials are like little sponges that love water and want to soak it up from the air around them.