Looking for glasses that flex and don't press on the sides of your head? Titanium frames are a good place to start. Titanium temples (the arms of the glasses) are very light and flexible, and they bend easily – they give way in use much like spring hinges, without a separate mechanism. That's why titanium frames sit comfortably on wider faces too and still feel light after a long day.
Browse titanium frames: banaanieyewear.com/collections/titaanikehykset
Actual spring hinges: Esco
If you specifically want temples with spring hinges (also known as flex hinges), where the hinge gives way outwards, you'll currently find them on the Esco model (titanium, €119).