Safety Flags

I have absolutely no experience with safety flags as they are not required in Alaska, however my wife saw a few ATV’s/SxS’s with flags last weekend and thought it would be a good idea to put one on our rig. Our local shops don’t carry them, so if we order one on line what do you guys that use them all the time recommend? Spring base? One piece, two piece, or collapsible pole? Regular triangle orange flag for less resistance than a larger rectangle flag? It never gets dark here in the summer, so no need for those fancy LED flashing light sticks. Pictures are appreciated! Thank you.