REI | Shoes | Rei Cabiniste Down Booties Slippers Grey Black 。REI Co-op Cabiniste Down Booties. These lightweight, packable camp slippers feature an insulated duck down body, a soft fleece-lined collar, a snap detail at the ankle cuff, and a durable non-slip black rand along the base. Men’s size XL Nylon and duck down. Insulation: Packed with responsibly sourced duck down for high-compressibility warmth.Exterior Shell: Built with a durable water repellent (DWR) coated nylon to resist light moisture.Comfort Design: Includes a warm fleece collar and internal elastic bands for a secure, comfortable foothold.Traction: Equipped with a nylon sole featuring non-slip polyester beads for indoor or inside-the-tent use Smoke and pet free home.