Add Ice to Rocks Glass.
Add 1 Lime (4 wedges), Simple Syrup, and Vodka to Cocktail Shaker.
Muddle Lime until juice is extracted, but not too hard that you break into the peel.
Stir Cocktail with a Bar Spoon until fully fixed.
Strain drink over Ice into the Rocks Glass.
Garnish with remaining Lime and stir.