In Venice in Casino Royale, Bond wears a blue two-button, jersey-knit cotton long-sleeve rugby shirt. What makes this shirt a rugby shirt instead of a long-sleeve polo shirt is its self-collar and a hidden-button fly placket. Polo shirts typically have a softer ribbed collar instead. The rugby shirt has a close fit and narrow shoulders for a modern look.
This shirt was not made by Sunspel like most of the other knit shirts in the film. However, the grey crew-neck undershirt visible underneath the rugby shirt is by Sunspel. The trousers are navy cotton twill chinos. Bond’s trainers are the Nike Air Articulate II model in (what appears to be) dark grey.