Jobst UltraSheer 20 30 Knee CT Black Medium Diamond Pattern Exercise Furniture Saturation Sound Pressure Level (SSPL) MSHQ 1885 Saturation Sound Pressure Level (SSPL) 118dB Frequency Range 200 4200Hz Total Harmonic Wave Distortion ≤10># td### Reference Test Gain 28±5dB Input noise ≤20dB Sound amplification 45±5dB Max Wall Plate (sold separately) that spand structural studs for rock solid support * A floor mast (sold separately) is also available when floor mounting is preferred * Can be used with a Floor Mast #PT WRM PCW * * Jobst makes your legs look as good as they feel * Provides relief from tired aching legs * Reduces mild swelling * Helps improve circulation * Provides continuous relief from tired aching legs and mild swelling * Use gradient technology to help improve circulation and revitalize your legs especially when sitting or standing for long periods of time * Latex free * Elegant diamond design perfect for stylish occasions * Unparalleled sheerness without sacrificing durability * JOBST© Advanced Comfort© gives stocking a light and cool feel for year round wear