Warmth Questions

Qistrel

1. Is there a level of warmth above 'bundled up'?
2. How much warmth does the Rune of Winter's Bane add?

Zyphora

I know that by padding gown, hat, shoes, coat, and cloak, I've reached the level of "heavily bundled up". I tried adding a vest (3 warmth), but I think "heavily bundled up" is the maximum.