The SE7 do not shift around at all. Presently the difference between the 3 heights isnt all that much. Just realized this 3 days after I could have returned them. I charged it, thinking maybe it needs a charge. at this point for a $10-20 mark-up over the G810 which is being phased out with a price drop. Cute colorsDelivered on timeStretchy The soft silicone(?) wings hold the speaker in the ear. Very feminine. They offered very good traction in slippery areas. The stitching on these shoes is so thick by the pinkie toe that it pushes against my toe, making these shoes impossible to wear.