Veridian Healthcare 360o Reusable Gel Sleeve (Small) Compression Treatment for Pain and Swelling. 4 ID x 6 L; Revolutionary gel sleeve surrounds treatment area and delivers soothing comfort and compression; Helps relieve pain and swelling; Durable clinical grade polyurethane gel sleeve; Pliable gel remains flexible and conforms to body contours; Patented roll-on design allows for hands free application; Non-toxic, latex-free; Includes a cotton compression sleeve to prevent direct contact to skin; Easy to use: freeze, refrigerate, hot water or microwave.