Soft and plush boots. Perfect for cold weather. They have been water proof and they are in perfect condition. 1. Twin-Face Sheepskin • This is the signature UGG material. • It has suede on the outside and soft, fluffy wool on the inside. • The wool is not stitched in separately—it’s part of the same hide, turned inside out. 2. Outsole • Most UGG boots use a lightweight, durable EVA (ethylene-vinyl acetate) outsole, which provides cushioning and flexibility. • Some upgraded or weather versions use Treadlite by UGG™, which is a proprietary rubber blend that offers better traction and durability. 3. Insole • Also lined with wool, or sometimes UGGpure™ (a textile made to feel like wool, but designed for sustainability—still real wool, just woven into a durable backing).