Coreloft
Arc'teryx's proprietary synthetic insulation using crimped multi-denier siliconized polyester fibers. Designed for high loft, excellent warmth, and compressibility in technical outerwear.
Score Breakdown
How long the fabric lasts with regular use
Softness, feel against skin, wearability
Air flow and ventilation
Heat retention and insulation
Ability to pull sweat away from skin
Environmental impact of production and disposal
How easy it is to wash, dry, and maintain
Best For
Good warmth (84) for cold weather
Good comfort (72) and care ease (68) for casual wear
Good durability (68) and comfort (72) for office wear
Good durability (68) and breathability (58) for outdoor activities
Detailed Use Case Scores
Pros
- ✓ Excellent loft and warmth-to-weight ratio
- ✓ More compressible than most synthetic insulations
- ✓ Retains warmth even when wet
- ✓ Consistent performance in variable conditions
Cons
- ✗ Proprietary to Arc'teryx — limited availability
- ✗ More expensive than generic synthetic insulation
- ✗ Not as warm per weight as high-quality down
- ✗ Fully synthetic — not biodegradable
Care Guide
Special Notes
• Machine washable synthetic insulation
• Tumble dry low to maintain loft
Additional Care Tips
- • Machine wash cold (30°C/85°F) on gentle cycle with technical detergent
- • Tumble dry on low heat to fully restore loft
- • Do not iron — heat damages synthetic fibers
- • Do not dry clean
- • Close all zippers and Velcro before washing
- • Store hanging or loosely in a breathable garment bag
Cost
$$$$$
Premium
Shrinkage
Won't shrink with normal washing
Eco Rating
High environmental impact