Mission briefing: Sub-zero temperatures, howling winds, and unforgiving terrain. The objective: maintain core body heat and combat hypothermia. The question for today's operation: fleece or wool?
When the mission calls and the weather turns hostile, choosing the right gear is critical. Here's a breakdown of two common cold-weather fighters: fleece and wool.
Fleece is featured extensively in our most popular products, including the Mantra Gilet and Shearling Cap.
Modern fleece is designed for high performance, typically using synthetic materials. These most common is a type of polyester called polyethylene terephthalate (PET). These fibres are constructed and treated to form air pockets that trap body heat, ensuring you stay warm without the added bulk.
This natural fibre is a backpacker's best friend — for good reason. Wool comes from the fleece of sheep, specifically the soft undercoat that keeps them comfortable year-round. Wool fibres trap air, creating amazing insulation that keeps you warm when dry.
We combine natural merino wool for comfort and odour resistance with synthetic fibres for peak thermal regulation and breathability in many of our ThruDark products, including our Stealth Seamless Base Layer and Bottoms.
Both fleece and wool are great for outdoor adventures, but they each have their strengths. Fleece is your go-to, all rounder for modest adventures — it's affordable, dries in a flash, and is generally lighter. On the other hand, wool is best for dry environments.
Both fleece and wool are champions in their own right, and the best pick depends on your mission. Let's break it down and help you choose the gear that conquers the elements alongside you.
When you need lightweight warmth, fleece is your go-to. It traps air efficiently, providing excellent insulation for its weight. Bonus points for drying quickly after a sweat session. But wool takes the crown for ultimate warmth. Merino wool, in particular, boasts incredible thermal regulation, keeping you warm in frigid conditions. Even when wet, merino wool retains some insulating properties.
Winner: Wool
This one's a close call. Fleece generally feels softer against the skin, especially for those who find wool a bit itchy. But high-quality merino wool can be incredibly soft and comfortable too. Here, personal preference comes into play. Fleece offers a familiar, plush feel, while wool can feel more natural and breathable.
Winner: Tie
Wool does a decent job of wicking away sweat, keeping you feeling fresh during moderate activity. But moisture wicking is why fleece was invented. It excels at wicking moisture away from your skin and absorbing it into the fibres. Even when damp, fleece will dry quicker than wool.
Winner: Fleece
Most fleece offers little to no water resistance. While it might repel light drizzles initially, it quickly soaks through, leaving you cold and damp. Wool, on the other hand, has a natural water-repellent coating called lanolin. This allows it to resist light rain and snow for a while. However, once saturated, wool loses most of its insulating properties. For serious waterproofing, consider a shell layer.
Winner: Wool
Lightweight and packable, fleece is a dream for adventurers on the go. It takes up minimal space in your backpack, leaving more room for essentials. Wool can vary in weight depending on the type. Merino wool, for example, is surprisingly lightweight and packs down small. However, heavier wool garments will add extra weight to your pack.
Winner: Fleece
Both fleece and wool are generally durable materials. Fleece might have a slight edge due to its synthetic nature, resisting snags and tears a bit better. However, with proper care, high-quality wool garments can also last for years.
Winner: Fleece
Just like the cotton vs. fleece debate, the battle between fleece and wool has no clear winner. It all boils down to the specific needs of your adventure. For pure warmth and battling the elements, especially in damp conditions, merino wool reigns supreme. For activities with high exertion and a need for quick drying, choose technical, shearling-style fleece.
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