I've been carrying the PHLster Flatpack Tourniquet Carrier for about a month.

It’s the first solution I’ve found that allows me to carry a SOFTT-W on-body, comfortably and unobtrusively. The Flatpack prevents the need to resort to a secondary tourniquet for first line carry, which makes it a valuable supplement to any EDC. BFE Labs offers an overview of the product in their first look.