i would leg warmers and wristwarmers and a hat if possible
I hooped outside when it was like 38 and sprinkling on Halloween and wore
• yoga pants
• leg warmers (fluffies)
• knee-high soccer socks (warm!)
• a tutu
• a tank top
• a long-sleeve top
• a fleece
• fuzzy hat
Once I warmed up I could take the fleece and hat off and do most moves no problem. I was able to hoop in that weather for about two and a half hours or so with that all on.
I replied on Facebook, but thought better to do it here instead. How about Under Armour clothing. It's what the some athletes and sports people wear to keep warm but not bulky. It's not sexy but you may be able to redesign it to be if you need it to be.
While on the subject, any ideas on a way to keep your hands warm without loosing grip on the hoop? I live in Canada, and winter is sooooooo long here.