ARC'TERYX Arc'teryx Nuclei Pant Nuclei Pant Size: S Color: Black Weight: 365 g Regular Fit Lightweight and packable, the Nuclei Pant is suitable for belaying at the crag or any place exposed to freezing cold. You can focus on your work without worrying about the cold. Coreloft™ Continuous insulation provides 80g from the waist to the knees and 60g below the knees, achieving an optimal balance of warmth and lightness. Lightweight and durable Arato 15 fabric blocks the wind, and the seat and knees are reinforced with Gore-Tex. Full-length side zippers allow for easy on and off at the crag. Easy-access side pockets are also useful for storing small items.