RoxSkin is a platform designed for athletes competing in HYROX races to secure sponsorship through a digital auction system. The app enables users to create a three-dimensional avatar of their own body using a smartphone scan or by uploading four photographs, a process that takes approximately five minutes. This avatar features 15 designated sponsor spots located on areas such as the chest, shoulders, quads, glutes, and biceps. Athletes can then open a sponsor auction for a specific race and share their personalized page with brands. Brands place bids on individual spots, and the winning logos are printed as temporary tattoos that the athlete wears during the race. Outbid brands are never charged; their payment hold is released when they lose a spot, making the process risk-free for them. Key features include real time bid tracking, the ability for athletes to approve logos, and visibility into which spots receive the most views. The platform also provides a command center where athletes can monitor their auction status, see raised funds, and manage their race schedule. Each athlete’s page displays their avatar with open and taken spots, current bids, and a countdown to auction close. The system is designed to facilitate a live bidding war, where each new bid can prompt further engagement from both the athlete and competing brands. Typical use cases involve HYROX athletes at various levels, including professionals, open category participants, doubles teams, and relay groups. The workflow begins with signing up and selecting the races the athlete plans to enter. After scanning the body and generating the avatar, the athlete opens an auction for a specific race and shares the link. Brands then inspect the avatar, spin it to see how their logo would appear on the athlete’s actual body, and place bids. Bidding closes before race day, at which point the winning logos are printed as temporary tattoos and shipped to the athlete. The athlete races while wearing the tattoos and posts photos afterward, providing brands with visible exposure. Technical requirements include a smartphone with a camera capable of scanning the body or the ability to upload four standard photographs. No specialized equipment or agent is needed. The platform handles all payment processing and bid management, ensuring athletes know their exact payout before race day. Examples on the site show athletes from locations such as Hong Kong, Paris, Dubai, London, Milan, and Singapore, with varying numbers of open spots and bid amounts.