The North Face - Borealis Sling. Color Steel Blue Dark Heather/Steel Blue. On sale for $41.77. MSRP $59.00.. 4.5 out of 5 stars+9Brand NameThe North FaceProduct NameBorealis SlingColorSteel Blue Dark Heather/Steel BluePrice$41.77MSRP: $59.00Rating4Rated 4 stars out of 5(439)