What to wear to Shaky Knees: Atlanta sits at 27°C (81°F) by day and 16°C (61°F) at night in May, on city park, with a moderate chance of rain. That means a light base with one warm layer you can carry, cushioned trainers or a low boot, and a bag small enough for the gate rules. The crowd leans indie, rock and grunge, so anything that survives the day reads as right.
Men's festival dressing at Shaky Knees comes down to three decisions: how much you can take off when it hits 27°C (81°F), what you put back on at 16°C (61°F), and whether your shoes can take city park for 3 days.
The dominant aesthetics at Shaky Knees are indie, rock, grunge and alternative. That is the visual language of the site, the stages, the merch, the crowd photos, and outfits that speak it look intentional rather than borrowed.
There is no enforced dress code. What the crowd rewards is a look that survives 3 days of city park without you having to protect it.
What people actually wear: one good layer over a light base, because the temperature halves after sunset.