Theres a $10.00, 5.5 ounce, umbrella H&M sells that I've been using for 4 or 5 years now. I've got a couple to keep one in my car as well. I like these so much I would probably not spend 40 bucks a chrome dome type unless in the desert.
Breaking down camp in the rain is much easier when you can wear your rain shell and set your pack under tour umbrella when it comes time to break down the tarp. Very convenient for me.
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