Which layer in a three-layer clothing system is designed to allow evaporation of sweat with minimal absorption?

• A. Middle layer
• B. External layer
• C. Internal layer
• D. Outer layer

Answer: (A)

In a three-layer system, moving sweat away from the skin so it can evaporate rather than soaking into fabric is the guiding idea. The middle layer acts as breathable insulation that sits between the skin-facing base layer and the outer shell. Its design prioritizes allowing water vapor to escape while minimizing how much moisture it actually absorbs. This keeps you warm without the middle layer becoming damp and hindering drying. The base (internal) layer is focused on wicking sweat away from the skin, and the outer layer protects from the elements while still venting moisture outward. So the middle layer’s balance of warmth and vapor permeability makes it the best fit for evaporation of sweat with minimal absorption.