"I bike daily, year round and usually lock my helmet to my bike, because I cannot F***ing abide strapping it to my bag and have it slapping into every door frame I go through. Leaving it locked to the bike is fine except when it rains or snows, it then gets a lot wetter than my own sweat would make it. Lately I've been riding Toronto's Bike Share a lot as the stations are very convenient and it saves my bike from winter wear. Yet taking a helmet with me seems more cumbersome because I'd have to carry it with me all the time. A collapsible or compact helmet is exactly what I need so I'm about to order one. All that said, I'd like to think designers commenting here might have taken a hot second to consider all the use cases before poo-pooing the need for a compact helmet."

"If you don't have a scaffolding why not use some kind hand-cranked conveyance - or use a gas powered auger in reverse like an Archimedes screw to carry the cement up to the guy troweling it on the wall. Something like that would almost act like a paint fed roller. Doesn't have to fancy - someone could trowel the cement at the bottom while the guy holding the auger could aim it to where the guy on the ladder wants it. Or maybe they tried all of those things and they failed miserably."