J65-AJ is the first Acronym® garment made using the remarkable Babyllama Air Jet Wool construction. Minimalist utility and luxury deliver organic comfort and well-being in a way no other mid-layer can. Loose hollow-core Babyllama fibres are injected into a tubular nylon yarn yielding insulation above and beyond expected volume to weight ratios. Unique short-sleeved construction strikes a perfect balance between jacket and vest. Handmade high-tech.