camping

Mid Layer

What is a mid layer?

A mid layer is an insulating garment worn between a base layer and outer shell in a layered clothing system for outdoor activities. It provides thermal insulation by trapping warm air close to the body while allowing moisture to pass through to outer layers. Common mid layer materials include fleece, down, or synthetic insulation, and they can be easily added or removed as conditions change to help regulate body temperature during hiking, backpacking, and camping.

Related Terms

Base Layer

A base layer is the innermost layer of clothing worn directly against the skin in outdoor layering systems. It serves to wick moisture away from the body and regulate temperature during hiking, backpacking, and other outdoor activities. Base layers are typically made from synthetic materials like polyester or natural fibers like merino wool, providing insulation when dry and maintaining warmth even when wet, making them essential for multi-season outdoor adventures.