These knee warmers help to relieve pain from stiff, achy, arthritic knee joints. Cozy 100% Acrylic Knee Warmers caress knees in warmth and comfort at home or on the go. Gently elasticized for a snug non-binding comfortable fit perfect under slacks or over hosiery. Import made of soft, washable Acrylic knit. Arrives as a pair, one for each knee. One size fits most.