Lululemon Athletica Inc. shares fell as much as 4.5% on Monday. Texas Attorney General Ken Paxton is investigating whether the company’s apparel contains PFAS. The probe examines if Lululemon misled consumers about product safety while marketing itself as a health-conscious brand. PFAS, also known as forever chemicals, are linked to various health problems. This investigation adds to challenges for the company as it manages slowing sales growth.