Hyke & Byke LLC is committed to improving animal welfare in the duck down and feather supply chain. We use down in our sleeping bags because of its superior insulating properties and warmth-to-weight ratio.The fill used in our bags is 90/10 premium quality down that is responsible sourced by being a byproduct of the meat and egg industry. We work hard to ensure that our down does not come from animals that have been subject to any unnecessary harm, such as force-feeding or live-plucking.