my phone is small , i carry it in my hand inside my glove, unless i have my jacket on, i think i'd worry without a phone , incase i had an accident or something , or maybe its a girl thing ? i just feel safer having some means of contact on me as i run on my own mostly
my door key is one, my running top has a tiny side pocket in it, this is also handy for parkrun barcode
i like the look of arm bad things people have - this is my next purchase i think now i have nice clothing and good shoes and essential ladies running underwear