If bassy yet compact headphones are your thing, then these should interest you. The design may feel uncomfortable on the ears though.
Pro Bass-focused sound with clear highs and mids
The highs and mids do not stand out as amazing, but they are clear and do not distort. The bass is quite good considering its small size. It produces good low-end depth and punch without bloating the overall sound.
While good enough for general music listening, these headphones perform best on bass heavy genres like dance, EDM, hip-hop and similar genres.
Pro Slim and lightweight design
The MDRZX220BT are primarily made out of plastic, making them quite light and easy to bring on the go. The slim design also makes these easy to fit inside bags.
Due to their light weight, these headphones will not put a lot of pressure on the head or neck when worn.
Con Can get quite uncomfortable to wear for long periods
The on-ear design of these headphones already puts a bit of pressure on the ears, which can be worsened due to the use of thin padding on the ear cups. Also, there is no padding on the headband which may cause hot spots on the head.