Place 3 lime wedges into a highball glass and muddle
Take 10 mint leaves and "clap" them between your hands
Place the mint into the highball glass
Fill the highball glass to the top with crushed ice
Add 0.5 oz of sugar syrup and 1.5 oz of white rum
Top up with club soda and stir gently
Top up with crushed ice
Garnish with a mint sprig