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![Burton [ak] Helium Grid Men's Fleece Half-Zip Size:XL Warmth: Body-mapped HEATSEEKER™ Advanced synthetic](https://cdn.shopify.com/s/files/1/1478/0486/files/Screenshot2026-07-17153535.png?v=1784320687)
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Duotone panel — violet briefing on the left, lime-sealed detail sheet on the right.
Burton [ak] Helium Grid Men's Fleece Half Zip Size:XL Warmth: Body mapped HEATSEEKER™ Advanced synthetic Warmth: Body mapped HEATSEEKER™ Advanced synthetic insulation has a dual fiber construction that provides a high warmth to weight ratio four way stretch 20K waterproof 20K breathable fabric half zip fleece that balances warmth and breathability it's the light
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