The North Face - Borealis Sling. Color Dusk Purple Light Heather/Dusk Purple. On sale for $42.74. MSRP $59.00.. 4.4 out of 5 stars+4Brand NameThe North FaceProduct NameBorealis SlingColorDusk Purple Light Heather/Dusk PurplePrice$42.74MSRP: $59.00Rating4Rated 4 stars out of 5(374)