Mar 05, 2026
by Jenny Lonnstam

Base Layer 101

Mar 05, 2026
by Jenny Lonnstam

Base Layer Basics

Mornings are busy, and outdoor school days mean getting kids dressed for all kinds of weather. The easiest way to start? A good base layer.

Why base layers matter:

They keep kids warm by holding in body heat.
They wick away moisture so playtime stays dry and comfortable.
They create a simple foundation for adding rain gear or outerwear.

Instead of guessing what to put on each day, starting with a base
layer makes dressing easy and ensures your child is comfortable no
matter the weather. Parents love them because they simplify mornings. Kids love them because they’re soft, stretchy, and move with them all day.

SHOP BASE LAYERS

Kids Lifa Merino Wool Printed 2-Piece Base Layer Set – LIFA Merino| Helly Hansen #color_navy-vikings

Wool Base Layers

Merino wool is known for its natural ability to regulate temperature. It keeps kids warm when it’s cold but can also help release heat when they start moving and warming up.

Merino fibers naturally manage moisture and resist odors, making them a great choice for long days outside or multi-day wear. The wool is soft and breathable, and many families love it for its comfort and versatility.

A great example is the Helly Hansen LIFA Merino base layer, which combines Merino wool with Helly Hansen’s LIFA fiber technology. This pairing creates a base layer that moves moisture away from the body while still providing the warmth and softness Merino is known for. It’s one of the warmest options and a favorite for cold outdoor school days.

SHOP WOOL BASE LAYERS

Kids Thermolite Lani Base Layer Set - High Wick | Reima #color_lilac-amethyst

Technical Base Layers

Technical base layers are designed to move moisture away from the skin very quickly. They are often lighter, quick drying, and extremely durable, making them a great option for highly active kids.

Materials like Thermolite are designed to trap warmth while remaining breathable. Synthetic layers can handle heavy movement, sweat, and frequent washing without losing their performance.

The Reima Lani Thermolite base layer is a great example. Thermolite fibers help retain warmth even in colder temperatures while still allowing kids to move comfortably. These layers are especially popular for active play, winter sports, and milder winter climates.

SHOP TECHNICAL BASE LAYERS

Which One Should You Choose?

Both wool and synthetic base layers perform well outdoors.

Merino wool is excellent for colder climates, longer wear, and temperature regulation. Synthetic base layers are great for high activity levels, durability, and quick drying performance.

Many families choose to keep both options on hand depending on the weather and the day’s activity.

No matter which you choose, the goal is the same. A good base layer keeps kids comfortable, regulates body temperature, and helps them stay outside longer.

Just remember the golden base layer rule - NEVER COTTON!

SHOP BASE LAYERS