The Complete Guide to Base Layers: What They Are & Why You Need Them
If you love spending time outside but have trouble staying warm—you’ve come to the right place! Base layers will keep you comfortable and warm all day long so you can enjoy all the outdoor activities you love year-round. Understanding which base layer to buy and wear can be overwhelming with so many different materials, weights, and brands to choose from. In this guide, we break down exactly what a base layer is and how to pick the perfect set for your next adventure.
What is a Base Layer?
Essentially, a base layer is the very first layer of clothing that you put on (after undergarments) that sits on top of your skin. It creates the “base” of your outfit and can make a huge difference in regulating your temperature and keeping you comfortable throughout the day.
What materials are base layers made from?
Base layers can be made from various kinds of fabrics and vary in weight from lightweight to heavy weight. Let’s dive a little deeper into that.
Merino Wool
Merino wool is by far my favorite material for base layers. Contrary to popular belief, it’s not itchy or irritating to skin.
Pros: odor resistant, moisture-wicking, and great at retaining heat.
Cons: takes longer to dry than synthetic fabrics.
Synthetics
Synthetics have become very popular over time. They are commonly made out of polyester or some combination of nylon, rayon, and polyester and tend to have a good amount of stretch to them.
Pros: moisture-wicking, stretchy, very durable, and a great affordable option.
Cons: don’t resist odors well—so they can begin to stink if you don’t wash them frequently.
Cotton
Cotton should never be used as a base layer, as it does not wick moisture and will become heavy and wet during outdoor activity, which can lead to hypothermia.
How to choose a base layer weight
Base layers come in several different weights. Typically, people have a set of each “weight” and rotate them seasonally, just like you do with socks, hats, or coats.
Lightweight
The lightest weight. Used in moderate to cool temps. I use these most when the temperature is between 60-40 degrees Fahrenheit, like camping or hiking in the shoulder seasons.
Mid weight
The most commonly used weight. Ideal for cold temps between 20-40 degrees Fahrenheit. I use this throughout the Winter for mid to high-intensity activities like sledding, snowshoeing, and hiking.
Heavyweight
The heaviest weight made for below freezing temperatures or low-intensity activities like snowmobiling or sitting around a campfire.
How should base layers fit?
To be as effective as possible, your base layers should fit snug on your skin. Some people like to leave extra room for “breathability” but that will ultimately compromise how well your base layers can wick moisture, which means they can’t perform as well.
My favorite base layers
Don’t fear—there are base layers for every budget. What are the key differences between a $50 base layer and a $150 base layer? A more expensive base layer will have a higher amount of wool and tend to be more durable.
Kari Traa
Their iconic base layer tops and bottoms are adorable—they come in so many colors and styles.
L.L Bean
I’ve used their Cresta mid weight base layers for three Winters and they’re still going strong.
Their heavyweight base layers are well-priced and durable.
REI
Their merino 185, mid weight base layers, and lightweight base layer tops and bottoms for men and women are a great value. They typically go on sale in the Spring and late Fall, so try and snag them when they’re 30% off!
Stio
My go-to base layers—they offer lightweight and mid weight base layers for men and women.
Stio: their basis power wool base layers are the perfect year-round lightweight base layer.
*Use code MYMAINE to get 10% off your next Stio order!
Are base layers worth the price?
If you’re new to the world of hiking or buying outdoor gear, the price of base layers may come as a surprise. But trust me when I say that investing in good gear makes a huge difference in your outdoor experience and will save you money in the long run, because it will far outlast the inexpensive gear that is likely to tear, rip, or break from heavy use. A lot of high-end gear companies (Patagonia, REI, L.L. Bean) have policies that will allow you to return gear that doesn’t perform as it is supposed to.
See you outside!
MyMaine
