The Arc'teryx Atom LT Hoody is a lightweight, highly packable synthetic insulated jacket designed for active use in cool to cold conditions. Featuring Coreloft™ Compact insulation for excellent warmth-to-weight ratio and moisture resistance, it maintains thermal performance even when damp. The sleek, minimalist design includes a helmet-compatible hood, articulated sleeves for mobility, and a full-length front zipper with chin guard. Pertex® Quantum fabric provides wind resistance and durability while remaining exceptionally light. Two zippered hand pockets and an internal chest pocket offer secure storage. The jacket compresses into its own pocket (shown in top-left with three packed versions), making it ideal for layering or emergency warmth on hikes, urban commutes, or travel. Its modern silhouette blends technical functionality with understated streetwear appeal, suitable for daily wear in fall/winter. The steel blue colorway offers subtle sophistication without sacrificing visibility. Highly breathable and quick-drying, it excels as a mid-layer under shells or as an outer layer in dry, mild winter conditions.