One common example of something we can touch but cannot see is "air." Air is composed of gases such as nitrogen, oxygen, carbon dioxide, and others. It is a fundamental component of our environment, and we interact with it constantly, yet it is invisible to the naked eye. However, we can feel the presence of air through its movement, such as wind or when it exerts pressure on objects.
Another example is "sound." Sound is the result of vibrations that travel through a medium, typically air, but it can also propagate through liquids and solids. We cannot see sound waves directly, but we can perceive them through our sense of hearing and feel them as vibrations if they are strong enough.
It's worth noting that the concept of something being "invisible" can vary depending on the context and the tools or instruments we have available to detect or perceive it. There are other intangible things that we cannot see directly but may have indirect effects or evidence of their existence, such as certain types of radiation or microscopic particles.