The North Face - Borealis Sling. Color Peak Purple/TNF Black. On sale for $56.00. MSRP $59.00.. 4.5 out of 5 stars+10Brand NameThe North FaceProduct NameBorealis SlingColorPeak Purple/TNF BlackPrice$56.00MSRP: $59.00Rating4Rated 4 stars out of 5(505)