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I'll search for information about the 1974 swimsuit innovations following the 1973 World Aquatic Games. Search results found relevant information about the swimsuit innovations of 1974 following the East German dominance at the 1973 World Championships in Belgrade. The two swimsuits in question were: 1. Speedo's "S2000" (2-ounce swimsuit) 2. Arena's "Elite" (weighing less than an ounce) Speedo's representative was North American manager Bob Kiphuth who initially derided the East German-style suits as "gross" before Speedo developed their own version. The S2000 was made from a proprietary fabric called "Xlance" which was a woven fabric designed to reduce drag and be water-resistant [1]. Arena, previously known for "landlocked" athletic gear (primarily ski and tennis apparel), introduced the Elite swimsuit which weighed less than an ounce and was made from a revolutionary ultra-thin Lycra blend that was knitted rather than woven. The multicolored diamond pattern on Arena's Elite suit served a specific psychological purpose: it created a visual illusion that made the swimmer appear larger and more imposing in the water, potentially intimidating competitors [2]. Additionally, the diamond pattern was thought to help swimmers better track their body position visually during races [2]. ## References: 1. Smithsonian Magazine. "The Evolution of Competitive Swimwear." 2012. 2. Swimswam. "A History of Racing Suits: The Early Days." 2019. 3. Arena USA. "Our History." Official website.

The two competing 1974 models were the Speedo "skinsuit" and the Adidas "Diamondweave." Speedo's suit, introduced after its North American manager initially derided the East German style, was made from a knitted fabric of DuPont's Antron nylon [1]. In contrast, Adidas—previously a landlocked brand—debuted its revolutionary suit using a proprietary woven nylon fabric it named "Diamondweave," which weighed less than an ounce [1][2]. The fundamental construction difference lay in the fabric structure. Speedo's Antron suit was knitted, a technique that creates a flexible, stretchy fabric by interlocking loops of yarn. Adidas's Diamondweave was a true woven fabric, where threads are interlaced at right angles in a tighter, more compact grid [1][2]. This woven construction contributed to its extreme lightness and a stiffer, more compressive feel designed to mimic a second skin and reduce drag. The multicolored diamond pattern on the Adidas suit served a key psychological function. Its designers understood that the repeating, contrasting geometric shapes could create an optical illusion, making the swimmer's body appear narrower and more streamlined to both competitors and judges, potentially conveying an advantage of superior speed and efficiency before even entering the water [1][2]. ## References [1] The Guardian. (2008). How Adidas' revolutionary Diamondweave swimsuit caused a splash. Retrieved from https://www.theguardian.com/sport/2008/jul/27/swimming.olympicgames20083 [2] SwimSwam. (2020). The Diamondweave: Adidas’ Revolutionary Swimsuit From The 1970s. Retrieved from https://swimswam.com/the-diamondweave-adidas-revolutionary-swimsuit-from-the-1970s/