For casual dressing in Tulsa, Oklahoma, visitors should embrace a relaxed, practical approach that reflects the city's unpretentious Midwestern character while accounting for the variable climate. During the warm, humid summers (May-September), lightweight fabrics like cotton, breathable shorts, t-shirts, and sundresses are ideal, along with comfortable walking shoes or sandals for exploring the city's outdoor attractions and arts districts. Spring and fall bring milder temperatures, making jeans, casual button-downs, light sweaters, and layers perfect for fluctuating conditions. Winters are generally mild but can be unpredictable, so having a warm jacket, jeans, and closed-toe shoes is advisable. Tulsa's style leans toward comfortable Western-casual, where boots, denim, and plaid are common and well-accepted across most venues, from local restaurants to cultural attractions. The city maintains a friendly, laid-back atmosphere where clean, neat casual attire is appropriate for most business events, networking functions, and social gatherings, though event planners should note that some upscale dining establishments or formal evening events may require slightly more polished casual wear or business casual attire.