Ooh, this is neat, new thing from Sinn, the DuoFlex diving strap system

Has tool-less quick change for straps of different colours/lengths and quick microadjust for the length

Here's the product info sheet for it: https://www.sinn.de/en/Download/Bedienungsanleitung/engl/Sinn_DuoFlex_en.pdf

It's probably going to sell a lot better than their last foray into novel strap systems which is this ridiculous thing they must have put together in a panic when they heard the sales figures from the apple iwatch or whatever