What to wear to Glastonbury Festival: Pilton sits at 21°C (70°F) by day and 11°C (52°F) at night in June, on open field, with a high chance of rain. That means a light base with one warm layer you can carry, waterproof boots, and a bag small enough for the gate rules. The crowd leans grunge, boho and camping, so anything that survives the day reads as right.
Men's festival dressing at Glastonbury Festival comes down to three decisions: how much you can take off when it hits 21°C (70°F), what you put back on at 11°C (52°F), and whether your shoes can take open field for 5 days.
The short version: No dress code. The only rule the crowd enforces is that you cannot look precious about your clothes.
The dominant aesthetics at Glastonbury Festival are grunge, boho, camp-practical and indie. 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 5 days of open field without you having to protect it.
What people actually wear: one good layer over a light base, because the temperature halves after sunset; wellies or waterproof boots on almost everyone by day two; the same jacket every day, because it lives in the tent and does everything; something identifiable, a colour, a hat, a flag, so your group can find you in a crowd of that size.