Read: How to choose an insulated jacket / Your guide to the layering system
Synthetic insulation offers consistent warmth when damp and dries more quickly than down. Polyester-based fibres trap air through microscopic structures, mimicking down's thermal mechanism without down's moisture vulnerability. Heatseeker and Primaloft represent leading technologies, offering 700+ fill power.
Browse mens insulated jackets and pick the fill and weight that suits how cold you actually get.
How much insulation do you actually need?
Down jackets are among the warmest options available due to their excellent insulation properties. The warmth depends on factors like fill power, down weight, and the down-to-feather ratio. Higher fill power (e.g., 800+) offers greater warmth with less weight.
Consider the following highly-rated models:
Mountain Equipment Lightline Eco Jacket: This jacket offers exceptional warmth with 296g of 700-fill power down, making it ideal for mountaineering and everyday use. It features a water-resistant Drilite Loft fabric, adjustable hood, and windproof properties.
Rab Microlight Alpine Jacket: A versatile option for hiking and climbing, this jacket uses 700-fill recycled down and features a lightweight, packable design with Pertex Quantum fabric for durability and weather resistance.
Montane Anti-Freeze XT Hooded Down Jacket: Known for its value, this jacket combines 750-fill hydrophobic down with recycled Pertex Quantum Eco fabric, offering warmth and packability for varied outdoor conditions.
These jackets balance warmth, sustainability, and performance for UK weather.
Yes, a snug fit is ideal to trap heat effectively while allowing room for layering underneath. Avoid overly tight fits as they can compress the down and reduce insulation.
Layering is key. Wear a moisture-wicking base layer and, if needed, a mid-layer like fleece or wool for added warmth. Adjust layers based on activity level and weather conditions.
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