Sale Klymit KSB Double Sleeping Bag Plenty of room for two, thoughtfully designed for 3-season comfort. The KSB Double™ features a 650 fill power down top and synthetic fill bottom provides exceptional warmth-to-weight ratio. The bag's versatility is made possible by its individual... MSRP: Was: $409.99 Now: $379.99 Sold Out. More On The Way!