In reply to ow arm:
Personally I'd like to know more about the seller than is perhaps possible on Amazon.
CE marks and other safety info is easy to fake. Online marketplaces are full of cheap knock-off stuff with fake safety markings.
Things I don't like: "ONE SAFE SOURCE" - why is their name all in capitals?
There is nothing on google about them apart from the amazon shop.
They are not listed on the companies house website.
The company it says it is made by "Kratos" is listed as dissolved ("Kratos ltd") on companies house website (although there are other variations on Kratos that are active companies) although it could well be a Kratos from outside the UK.
I wouldn't trust a harness myself unless I knew where it came from.