The Sennheiser PXC 250-IIs win a prize for the their portability. You’ll be forgiven for handling them with care, but the steel headband is strong, so there’s no worry there.
On the downside, though, they’re just not that fun to listen to. While there’s decent detail and separation, the dynamics are slightly biased towards the vocals.
This is fine for songs like Birdy’s haunting Shelter, but with tracks such as The Rolling Stones’ Gimme Shelter, there isn’t enough drama.
The noise-cancelling is fine, but not much better than that on the Panasonic RP-HC101.