Kate keeps it casual while watching the princes play polo (and Lupo was there too!)

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This weekend Kate cheered on William and Harry at a charity polo match while keeping things casual in a silk shirtdress by UK-based label Libélula. The long sleeve, knee-length look is quickly becoming her signature style, and it seems like Kate’s other must-wear item—sheer tights—are on the way out. Perhaps her choice of shoe inspired the need for bare legs? Kate wore a pair of open-toed Stuart Weitzman wedge espadrilles, which allowed her to walk across the grassy polo fields with ease—and right up to the podium where she gave both princes a kiss after their team won. (Not pictured: many other kisses from Kate and Will’s royal pup Lupo, who also adorably attended the event.)