Okay smth I have observed in SF is that many people wear Patagonia jackets, is this like a trend going or they just prefer this brand? My guess is they are devs working on startups. 

Also how to be a member of /sf channel, can anyone add me please?

Founder of /farcastea
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Tech bros. It’s a mean. A starter pack if you will. 

Almost required. Many companies give them away so people tend to wear them so much it’s a meme.