On ear on in ear? I have the Senn PX-100’s too and like you I recently purchased Grado SE60’s for something light.
I have some Sony SBH80 wireless in-ear’s that I really like for around the house and around the yard but I’m also looking for some light on-ear ‘phones. I also use the Apple buds I got with my iPhone 7.
I read good reviews of the Mee Runaway 4.0 wireless, but haven’t tried them yet. I’m interested in seeing the recommendations.