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Can I Layer Merino Wool Under a Waterproof Shell?

April 5, 2026

Quick Answer

Yes, you can layer merino wool under a waterproof shell, offering warmth, moisture-wicking, and breathability to your outfit. This combination works well for hunting and outdoors activities. Merino wool's natural properties complement the waterproof shell's functionality.

Choosing the Right Merino Wool Layer

When selecting a merino wool base layer, consider its thickness, usually measured in grams per square meter (gsm). For colder climates or high-intensity activities, opt for a thicker layer with a higher gsm rating, typically 230-300gsm. In milder conditions, a lighter layer with a lower gsm rating, around 150-200gsm, will suffice.

Combining Merino Wool with a Waterproof Shell

When layering merino wool under a waterproof shell, ensure the merino wool is not too thin or too thick for the conditions. A general rule of thumb is to wear a merino wool layer between 1/3 and 1/2 the thickness of your entire outfit. This balance prevents overheating while maintaining warmth. Additionally, choose a waterproof shell with breathability features, such as membranes or mesh panels, to facilitate moisture transfer.

Tips for Effective Layering

To maximize the benefits of merino wool and a waterproof shell, maintain proper layering techniques. Wear a moisture-wicking base layer (e.g., merino wool) next to your skin, followed by a mid-layer (e.g., fleece) for insulation, and finally, the waterproof shell for protection. Adjust your layers according to the activity’s intensity and environmental conditions to maintain optimal comfort and performance.

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