SITKA Kelvin Aerolite 30 Sleeping Bag

Item #: N/A



Named on Outside Magazine’s list of the Best Hunting Gear of 2022, the SITKA Kelvin Aerolite 30 Sleeping Bag is a multifunctional layer for active time in camp, cold glassing sessions or dreaded midnight nature calls. Synthetic PrimaLoft® Gold Insulation with Cross Core™ technology replicates the aesthetics and performance of down insulation, but with warm-when-wet performance. Featuring a 30-degree comfort rating, it’s designed to be an extension of your SITKA clothing systems for full-season performance, even in the wettest conditions. Jacket-like features include zippered, functional armholes; contoured shoulders and hood, and a center-front two-way zipper.


  • Synthetic PrimaLoft® Gold Insulation with Cross Core™ technology replicates the warmth and compressibility of down, but with the benefit of warm-when-wet performance.
  • Lightweight insulation (35% recycled) is infused with silica aerogel, a nearly weightless material that’s composed of more than 95% air and acts as additional thermal insulation. Read more about Aerolite technology here.
  • ISO 23537, 30-degree comfort rating; designed to be worn with other layers in your SITKA clothing system for colder conditions.
  • Stowed hook at bottom of bag connects to mid-length interior loop; shortens the bag for walking.
  • Durable water repellent finish resists precipitation and prevents face fabric from wetting out.
  • Contoured shoulders and hood for a shaped and functional jacket-like fit when active.
  • Armholes positioned for functional mobility; baffled draft tubes seal in heat.
  • Shaped foot box provides even warmth around your feet.
  • Center-front two-way zipper.


  • Reg: up to 6′
  • Long: up to 6’6″
  • Total weight: 38 oz.
  • Imported
  • 20-denier polyester face and backer
  • Packability: 5/5
  • Wearability: 5/5
  • Durability: 4/5
  • Utility: 5/5
  • Breathability: 4/5
  • Fit: Product is Expedition Fit, designed for full layering in all conditions.



“Building a system is not something you do as much it’s a way you think.”

– John Barklow, SITKA Big Game Product Manager

SITKA took experience and insights designing clothing systems and applied that knowledge to the sleeping bag, turning something you typically use just for sleep into a multifunctional tool for backcountry use.


Weight 2.5625 lbs
Dimensions 22 × 14.5 × 8 in