The Arc’Teryx Nuclei FL is technically an insulated belay jacket, but it could work great as an insulating mid layer. It has a wonderful trim fit that works well for under a technical ski jacket.
Arc’Teryx Nuclei FL Review
Matt’s Specs: Sizing Info
Waterproofing and Breathability: The Arc’Teryx Nuclei FL has a water repellent treatment, but really isn’t designed for use in wet weather. If the weather is calling for snow or rain, you’ll want to use this jacket under a technical shell and not on its own. The Nuclei is breathable, but also pretty heavily insulated. It’s going to warm you up quickly and keep you warm.
Warmth: The Arc’Teryx Nuclei FL has strategically mapped insulation for warmth. It has 80g of Coreloft in the torso, and 60g in the arms. Alone, the Nuclei will provide some decent warmth, but it’s not wind or waterproof. Putting this under a technical shell gives you the weather protection you want, with some pretty decent warmth.
Fit: The Arc’Teryx Nuclei FL has a trim fit that feels true to size. The Trim fit does reduce the overall bulk and make the Nuclei better for under a technical shell. The arms are articulated, and the jacket feels easy to move in. The Coreloft insulation offers good warmth to weight ratio so the jacket isn’t very bulky.
Features: The Arc’Teryx Nuclei FL has an insulated contoured hood and harness compatible pockets. The Coreloft insulation is warm without being bulky, and the jacket packs down really small.
Bottom Line: The Arc’Teryx Nuclei FL would make a great insulating mid-layer. Put it under a technical shell for solid weather protection, or use it as an around town jacket on dry and cold days.