Under Armour brought a “zero gravity experience” to SXSW to promote its new UA Hovr line of running shoes.

Visitors to downtown Austin, Texas, noticed a geodesic dome being erected on Wednesday, as pointed out by Twitter user HappySlice.

Dubbed Hovr House, the giant red dome arrived at SXSW after its first stops in LA and Shanghai last month. The pop-up experience filled its dome with athletes and celebrities among displays of UA Hovr running shoes and an “elevated track,” an aerial rig that lets users run up a vertical wall.

The activation follows the theme of its new lightweight shoes, “Gravity holds you down, feel how UA Hovr lifts you up.” This experiential marketing activation continues the biggest and most expensive campaign for a product the brand has ever done.

Under Armour’s experiential marketing campaign continues in Texas this weekend with pop-up running events, live UA footwear customizations by Dez Customz, an outdoor lounge and a VIP meet and greet event.

Hovr House will be open to the public beginning Saturday, March 10 from 11 a.m. to 5 p.m. and Sunday, March 11 from 11 a.m. to 5 p.m.

The athletic brand is throwing everything it has at its new UA Hovr line, beginning with a simultaneous world release—the first of its kind for Under Armour. Pop-up activations and influencer marketing play a significant role, going so far as to deliver shoes to online celebrities in white Rolls-Royce Phantoms. (Phantom is the name of one of Hovr’s first models.)

Digital ecommerce is ravaging retailers, and Under Armour is no exception. Last year, the company reported their first quarterly loss since going public in 2006. Under Armour shook things up by hiring a new COO and CMO in 2017 and is shifting focus to young consumers with technology like app-connected shoes and gaming.