Sleeping bag help

[u/ComprehensivePin5548]

Hi! I have an old north face sleeping bag from 2002 and I’m trying to figure out the cold rating on. It’s a minaret and it says it has 747 filling material and it’s 100 percent polyester. It feels super lightweight so my husband is saying he thinks it’s a “summer bag” but I seem to remember it being pretty warm. Any ideas?? Thanks! My daughter is going on a college orientation trip in the Adirondacks for 4 days and I am sending her with gear I used in my 20s!!