https://www.theverge.com/circuitbreaker/2018/5/15/17353562/master-dynamic-mw50-plus-headphones-on-over-ear-style-convert

Master & Dynamic is releasing the MW50+ today, a slightly updated version of its MW50 headphones that brings an intriguing twist to the company’s product lineup: the ability to swap between on-ear and over-ear styles in a single pair of headphones.

The original MW50 headphones were specifically designed to bring the iconic style of Master & Dynamic’s MW60 to a smaller and lighter on-ear style. The MW50+ is the same basic hardware, but comes with easily swappable ear pads to switch between the two styles of headphones at a moment’s notice. Both the old on-ear and newly introduced over-ear pads are made from lambskin-covered memory foam and attach magnetically, making it simple to swatch them out. It’s a seemingly minor upgrade, but for users who hate having to decide between the on-ear and over-ear headphones, it’s likely to be a welcome one.