Sonntag Fins

Sonntag Fins is a brand specializing in custom carbon fins for windsurfing. Its range is organized around different sailing disciplines and fin designs, including Slalom, Formula, Speed, SL-Pro, SL-Weed, SL-X, GPS-Weed, GPS_6, and GPS_X2W models. The company provides information about its fin materials and design process, with dedicated resources covering 3D design, computational fluid dynamics (CFD) analysis, and laboratory testing. Visitors can also consult details on rake and base dimensions, along with a surface-area chart for the different models, to help understand the range of available fin specifications.

The website offers company information, news, and a way to request further details or contact the team. It also features apparel and other products. Sonntag Fins presents its work as focused on custom carbon windsurfing fins, supported by technical design and testing information. The site includes links to company data, terms and conditions, privacy information, and other business and legal notices.