The North Face - Borealis Sling. Color Steel Blue Dark Heather/Steel Blue. On sale for $53.15. MSRP $59.00.. 4.5 out of 5 starsAdd to favorites. 0 people have favorited this+9Brand NameThe North FaceProduct NameBorealis SlingColorSteel Blue Dark Heather/Steel BluePrice$53.15MSRP: $59.00Rating4Rated 4 stars out of 5(530)