Madelegano Couch Arm Covers, Sofa Arm Covers, Waterproof Armrest Covers for Sofa. Waterproof & Non-Slip: Madelegano couch arm covers are made of soft, cozy and durable materials. These armchair covers can be used as armrest covers, headrest protectors, and seat covers for fabric or leather couch, recliner, loveseat, and more.