Graded at Grade A+ - No signs of use, like brand new condition. UKSF Issue.
 
The Arc'teryx LEAF Atom LT is a lightweight, synthetically insulated mid-layer designed for high-output activity in cool to cold conditions, usable either as a standalone outer or beneath a shell system.
It is built around a Coreloft™ 60 g/m² synthetic insulation package, delivering efficient thermal performance while maintaining loft and warmth in damp environments. The insulation is combined with a Gossamera™ softshell face fabric, providing wind resistance, durability, and low noise for operational use.
Breathability and mobility are enhanced through Polartec® Power Stretch® side panels, allowing heat and moisture to escape during sustained movement while maintaining a close, articulated fit.
The design prioritises lightweight warmth, compressibility, and freedom of movement, making it suited to transitional climates or active use where heavier insulation would cause overheating. Compared to heavier LEAF pieces, it is intentionally lower warmth but significantly more breathable.
Key features (manufacturer-era spec):
Coreloft™ synthetic insulation (~60 g/m²)
Warm-when-wet performance
Gossamera™ softshell outer (wind-resistant, quiet)
Polartec® stretch side panels for ventilation
Lightweight, compressible construction
Designed for standalone or layered use
High mobility, low bulk