Historical clue formulations

• Stretchy material — 2026-01-25
• Bicycle shorts material — 2025-12-08
• Synthetic fabric sometimes called "elastane" — 2025-08-08
• Yoga pants fabric — 2025-03-12
• Stretchy sportswear material — 2017-11-22
• Swimwear material — 2015-06-02
• Bicycle shorts material — 2012-11-27
• Wet suit material — 2012-07-04
• Biker's wear — 2008-12-13
• Stretchy fabric — 2008-01-07
• Stretchy synthetic — 2007-05-29
• Sock fiber — 2007-05-20
• Fiber for wet suits — 2007-03-01
• Du Pont trademark — 2001-03-01
• Stretch material — 1999-05-19