Not only does this leg pillow help prevent back issues for side sleepers, but it also has a gel-infused memory foam that feels cool to the touch and molds to the knees for custom support! Pillow helps restore your natural spine alignment, cushions your knees, and stabilizes your hips. Included breathable quilted cover also ensures your legs stay cool during the night. Approx. 10"x 8"x 5.5". 100% Polyurethane; Imported.