Wikipedia
Svalinn
In Norse mythology, Svalinn is a legendary shield which stands before the sun.
The name Svalinn means "cold" or "chill" and is derived from the verb svala means "cool"; svala sér means "to slake one's thirst" and svala-drykkr is a "icing draught".
It is attested in original Grímnismál:
''Svalinn heitir, ''hann stendr sólu fyrir, ''skjöldr, skínanda goði; ''björg ok brim, ''ek veit, at brenna skulu, ''ef hann fellr í frá. - Grímnismál 38, Guðni Jónsson's edition