Australian Merino wool knitted upper Woolloomooloo Wool Darwin Gray Australian Sustainable Lace Up Sneaker 40 9Australian Merino wool lined footbedMachine WashableBreathable and barefoot friendlyExtras Ecru Elastic lace shipped in box. Easily transforms this classic into a "slip-on"Australian Merino Wool is renewable, sustainable, biodegradable, soft and durable; and makes the most comfortable footwear in the world.Merino Sheep's wool is softer than regular wool because of how fine the fibers are. It's next to skin softness is what makes it one of the most sought after fibers in the world. Woolloomooloo shoes are even softer than other merino wool products on the market because we digitally knit our wool & never boil it, which maintains its natural fibers. Maximizing softness.FINER THANHUMAN HAIRWool knowsno seasonMerino wool's warmth is relative to its weight. In the chillier months, wool works to insulate your skin from the cold environment by trapping heat within the structure. It's not magic, it's the natural crimp of the wool fibers that traps pockets of still air.When temperatures rise, wool can feel up to two times cooler than synthetic fibers thanks to its ability to transfer moisture away from the skin.Wool Is SustainableBecause our Merino Wool grows on our sheep's backs, it is no different than the hair on your head. Merino Wool is widely considered the world's most sustainable fiber.