The 4F logo, used by a sportswear, footwear and accessories brand, is a compact mark combining the number 4 and the capital letter F in a consistent graphic style. Both characters are formed with broad strokes of uniform thickness and have a slight rightward slant. Their shapes combine straight lines, pronounced diagonals and broad rounded curves, while the narrow spacing between the characters gives the mark a cohesive, compact appearance. The logo is used in a single-color version: black on light backgrounds and white on dark backgrounds. The name 4F was introduced in 2010 as a shortened form of the former 4F Sport Performance name, which the brand had used since 2007 after changing its name from 4Fun. Brand founder Igor Klaja explained that the shorter name was adopted because it was simpler and easier to use in communication.
4F is a Polish sportswear, footwear and accessories brand owned by OTCF S.A., a company founded by Igor Klaja in 1995. The brand’s retail history began in 2003 with the opening of its first company-owned sportswear stores under the 4Fun name. In 2007, the name was changed to 4F Sport Performance, and since 2010 the brand has operated as 4F. Today, it produces clothing and equipment for training, professional sports and everyday wear, while OTCF products are available in 44 countries. 4F also works with sports federations, clubs and national teams, creating competition, training and official teamwear for them. At the 2024 Olympic Games in Paris, six national teams competed in 4F clothing.
