really nice mars, if have much movement need tuneup service to change the rubbers inside the nose bridge or can put 50’s tshocks to get more strong in the arms wen you wear it
There should be a small amount of movement. Put the glasses on like goggles to prevent spreading the stems wider than needed to protect the couplers in the bridge...if the couple wears, then the movement becomes to great and they won’t stay on your head. You can also swap to a larger t shock, as @Fernando stated, but sometimes that won’t even help...