WayV did some modeling for Skechers China therefore you can see that most of them is swearing the brand. Unfortunately the clothes can't be found online, but check out below what could be found from Moonwalk dance practice.

WinWin is wearing the Pullover from Skechers

 The last part of Take Off with WayV.

 See also: 

Request: WayV's 'Take Off' MV

YangYang is wearing:

Moto Leather Jacket from ALYX

Feff Longsleeve from Daily Paper

WinWin is wearing the lace-up collar sweatshirt from UNDERCOVER

WayV started releasing their teasers again for this debut. I hope that they get to wear other brands than these to show off their different styles. Stayed tuned for more. 

See also:

WayV's 'FEEL THE V' Teaser
WayV's 'Regular' Concept (3)

Lucas is wearing:

Piped Marble-Print Satin Western Shirt (modified) from Dries Van Noten

Marble-print straight velvet trousers from Dries Van Noten