I find that heavy jewellery can make the problem worse so I have come up with a solution
If like me your thermostat is on the blink you may like these cool as a cucumber cotton necklaces
Light as a feather crocheted flower lace, they have a little magnetic clasp so no more getting hot and bothered trying to fasten and the glass beads feel so cool against your skin
As a bonus they are also fashionable in a Boho, Hippy, Festival kind of way!
I have added a few to my Etsy Summer Sale for just £5 as an introductory offer each plus shipping to see if people like them and if you do I will make some more :)