Esteem® + One Piece Drainable Opaque Filtered Ostomy Pouch, 12 Inch Length, 1 Inch Stoma, 1 Box of 10 Extrication Supplies Knee Hi * Expresso * Walkers Specialty Accessori Knee Hi * Expresso * 20 30 mmHg * Large * Ankle Circ 10 113 8 Calf Circumference 12 1 2 18 1 8 * Beautifully sheer hosiery Durable long lasting * Sandalfoot styling * Gradient compression for relief and prevention of venous disease * Therapeutically effective sheer lightweight and fashionable * Saturation Sound Pressure Level (SSPL) 113dB Frequency Range 200 5000Hz Total Harmonic Wave Distortion ≤3% Reference Test Gain 27±5dB Input noise ≤32dB Sound amplification 29±5dB Max and comfortable experience A state of the art filter with anti clogging film layer