Adjustable nose bridge is functionally defective; keeps coming lose and detaching. Mine got lost and has rendered the goggles useless. Comes with different nose bridge sizes but only one size each so I was unable to use them to replace my bridge size.. I know another swimmer who has experienced the identical problem. This problem has turned an otherwise very well designed and fitting goggle into a seriously defective product. Note: These goggles have the best visibility and fit I've experienced in over 25 years of open water swimming. So, I'm asking for a replacement and intend to insert a small wedge into the bridge channel to prevent them from sliding out. Will see what happens.