One for the black sheep. C1-AJ is a crew neck sweater in a hand knit Babyllama Air Jet Wool construction. Loose hollowcore Babyllama fibers are injected into a tubular nylon yarn yielding insulation above and beyond expected volume to weight ratios. So light and comfortable you will never want to take it off. Knit undyed in 'blackllama' wool from the darkest naturally occurring llamas. Organic color variation may occur. Handmade high-tech.