The North Face - Borealis Sling. Color Steel Blue Dark Heather/Steel Blue. On sale for $41.75. MSRP $59.00.. 4.5 out of 5 stars+11Brand NameThe North FaceProduct NameBorealis SlingColorSteel Blue Dark Heather/Steel BluePrice$41.75MSRP: $59.00Rating4Rated 4 stars out of 5(486)