Merino wool is designed to be used year-round, and its soft next to skin feel along with its superior temperature regulation, and moisture wicking makes it a fantastic choice for hunting.
Being that merino wool has natural crimps, the fiber is able to capture and trap more dead air creating warmth. Merino wool also does a great job of pushing moisture away from the skin so that you remain dry. Merino has the ability to absorb over 25% of your body's moisture and still feel dry and warm as opposed to polyesters which will wet out and chill at 5-10%.
Being that merino stores moisture it can readily increase evaporation when you begin to overheat allowing the air between your skin and the fabric to cool. The higher exertion and activity, the more evaporation takes place allowing for greater temperature control. There are a lot of variables that go into the decision of what weight will work best for you but below is a brief guideline of recommendations.
Spring / Early Fall
Spring/early fall temps tend to fluctuate significantly. A mid-weight merino is typically best. This time of year can call for both a base and mid-weight layer.
- Fabric weight: 170-220 gsm
- Temp range: 35-60 F*
- Time of year: April-May & September-November
- Micron: 17.5 – 18.5
The summer is a great time for lightweight merino. Merino has great temperature regulation attributes to help push moisture out and cool the skin.
- Fabric weight: 120-170 gsm
- Temp range: 50-75 F*
- Time of year: May – September
- Micron: 17.5
Late Fall / Winter
Go heavy. Late season hunts mean temps below freezing and having a heavy base or mid layer is necessary. Again, at this time of the hunting season, you should be wearing multiple layers under your shell to stay warm.
- Fabric weight: 220-400 gsm
- Temp range: 0-35 F*
- Time of year: November – March
- Micron: 18.5