Instruction manual for when first get them. Intially I was gutted I'd just wasted £50 on another pair of leaky goggles as water came in by the bridge on one eye. I wiggled them around and pressed them firmly onto the eye socket and this seemed to sort out the little leak until I did a kick off into back stroke at the other end of the pool and water came in again ...I made it to the other end to have another fiddle and readjustment and all was good. I didn't realise they came with other bridges...so will have a play with these. But is their a wrong way to put them on. A little guidance would have reassured me.