In addition to being lightweight, the Razer Kraken is completely adjustable to fit heads of all sizes. The entire design is finished with synthetic leather-covered ear cushions, which provide soft, padded surfaces that cover your ears covertly and block out outside noise for a better listening experience. 7.1 Surround Sound Immersion for Positional Audio: equipped with specially adjusted 40 mm drivers, which, when used exclusively for PC gaming, can produce software-enabled surround sound (download code slip inside the box). Made to Be Comfortable All Day: At 230 grams, this Kraken headset is the lightest ever and about 40% lighter than the competition. Flexible Noise-Cancelling Cardioid microphones cut down on background and ambient noise to provide crystal-clear communication. Sturdy Construction: The Kraken X frame is long-lasting and flexible.