The North Face - Borealis Sling. Color Crater Aqua/Blue Moss. On sale for $41.30. MSRP $59.00.. 4.5 out of 5 stars+9Brand NameThe North FaceProduct NameBorealis SlingColorCrater Aqua/Blue MossPrice$41.30MSRP: $59.00Rating4Rated 4 stars out of 5(486)