The North Face - Borealis Sling. Color Solar Blue/TNF Black. On sale for $43.10. MSRP $59.00.. 4.4 out of 5 stars+4Brand NameThe North FaceProduct NameBorealis SlingColorSolar Blue/TNF BlackPrice$43.10MSRP: $59.00Rating4Rated 4 stars out of 5(374)