What do you put in a swag bag for a billionaire CEO?If the outfits at Sun Valley offer any indication, the answer is…pretty similar to what the average Joe or finance guy would get.The annual Allen & Co. Sun Valley Conference is taking place this week, offering power brokers in tech and media fertile ground to hobnob, make deals, and play a few rounds of golf.Many are sporting looks befitting of the conference nicknamed "summer camp for billionaires." Some also appear to be going around with swag that attendees presumably receive.Microsoft CEO Satya Nadella and Uber CEO Dara Khosrowshahi, for example, were spotted wearing a conference hat. All of the conference swag appears to carry the SV25 logo, referring to Sun Valley 2025.Spanx founder Sara Blakely wore an SV25 jacket while walking around Sun Valley. It appears to be made by Cutter & Buck, which makes upscale athletic wear for golf and other sports.Snap CEO Evan Spiegel appeared on CNBC in a similar jacket.Jeff Boyd, former CEO of travel company Booking Holdings, was seen in a red puffer vest with the SV25 logo.Former Yahoo CEO Jerry Yang wore a blue conference polo, which appeared to be made by The North Face.Besides clothing, many attendees were also seen toting around a large branded binder, presumably with a notepad or a schedule of events and sessions inside.Of course, attendees at the invite-only retreat could be getting a lot more swag than we can tell. (Allen & Co. did not immediately respond to our request for comment.)If they don't want to hold on to all of it, it seems some guests have sold swag from years past. eBay, for example, has plenty of listings of puffer vests from prior Sun Valley conferences. So if you can't score an invite, you might still be able to get your hands on one.