The North Face - Borealis Sling. Color Dark Cornflower Dark Heather. On sale for $55.41. MSRP $59.00.. 4.5 out of 5 stars+10Brand NameThe North FaceProduct NameBorealis SlingColorDark Cornflower Dark HeatherPrice$55.41MSRP: $59.00Rating4Rated 4 stars out of 5(476)