Just picked these up and they are perfect for using Rift.
The rimless frame and thin arms are great for fitting inside the headset. Very comfortable. And the lenses are nearly the same size as the Rift lenses, so I can get the full FOV while playing.
The model number is "Airlock Wisdom 203" if anyone wants to get them.
AMD Ryzen 7 1800X | MSI X370 Titanium | G.Skill 16GB DDR4 3200 | EVGA SuperNOVA 1000 | Corsair Hydro H110i
Gigabyte RX Vega 64 x2 | Samsung 960 Evo M.2 500GB | Seagate FireCuda SSHD 2TB | Phanteks ENTHOO EVOLV