Using the article or not using it is user's choice. There are many products which has been developed but individuals in armed forces don't generally use them by individual choice. Same is here.The link that you've given here only shows what products are made by a company, it doesn't talk of anything being in service.
that article is from 2010.
here are some more recent mentions of people who've been in the thick of armoured combat in a desert much more recently.
How do soldiers withstand the intense heat inside a tank?
Answer (1 of 24): I served with 2nd Tank Battalion (US Marines) as a Forward Air Controller/Air Officer in 1998–1999. One of the greatest tours I did, by the way, fantastic group of Marines. I had wondered this myself about the heat in the desert……we did have an air blower (we have another name ...www.quora.com
None of the accounts talk of a tethered cooling system in service.
Here is an account of aircrew using tethered cooling systems available onboard helicopters, which by the way, have far more internal space for moving around than a tank.
This is what it says on here -
"Helicopter pilots and their crews already use aircraft-mounted cooling systems to beat the heat. But while these systems have been shown to improve endurance and performance levels in hot climates, many crewmembers avoid using them because they tend to be inconvenient.
Such onboard cooling devices are equipped with tethers (Same as the DRDO variant) that soldiers need to attach themselves to in order to cool down. But moving around the back of a cramped helicopter on a tether is no easy feat, the researchers said. "
Make of it what you will.. this is the last from me on this.
But point is, you can't compare a cooling vest worn by bikers with a active cooling system like this.
