Sheepskin and Velour Replacement Ear Pads for Sennheiser HD820 Series Headphones. The Sennheiser HD820 are Sennheiser’s counterpart to the beloved HD800 and 800S, sporting the same sleek design with a beautiful glass panel to turn these cans into truly high-end closed-backs. Dekoni looked to add to this prestige with their line of earpads for the HD820, giving audiophiles the opportunity to tune the HD820 to their liking. The Sheepskin outer ring improves isolation and the velour face gives a soft, velvety touch. Dekoni Audio created this Frankenstein from the best of all its pads, and it represents the pinnacle of the Dekoni brand.