The OCS Replacement Liner for OrthoPro™ Passive Night Splint works with the rigid splint to hold the foot in five degree dorsiflexion throughout the night to give passive stretching of the plantar fascia, calf muscles, and Achilles tendon. The plush padding is treated with Kool-Wick and Bacti-Ban to keep you dry and comfortable and the nonskid bottom helps to give sure footing for those short trips during the night. Attaches to rigid splint (sold separately) with Velcro for easy replacement. Fits right and left foot. Order by Women's and Men's shoe size.