The Tec-9 | Groundwater skin was added to CS:GO on October 28, 2015 as part of the Arms Deal 3 Collection.
The Tec-9 | Groundwater skin features a light blue top section fading into a darker blue on the grip and barrel. It has an abstract water wave pattern across the whole gun.
The Tec-9 | Groundwater is a relatively common but still sought after Tec-9 skin. As a classified skin from Arms Deal 3, it maintains solid demand in the CS:GO skins market.