sitka gear|SKU:20-40086-SA-RGL

Kelvin Aerolite 30 Sleeping Bag — Warm-When-Wet 30°F Camp Layer

Warm-When-Wet Insulation for Full-Season Backcountry Hunts

Warm when wet — Synthetic PrimaLoft® Gold won't clump like down
Wearable camp design — Zippered armholes for glassing without exiting
Walking mode built in — Stowed hook shortens bag for camp mobility
38 oz packed weight — Compresses small enough for backcountry packs
DWR shell protection — Resists condensation and drizzle in wet camps
  • Free shipping -- Fully insured — signature required
  • Free pre-purchase consult -- Talk to a hunter who knows sleep systems
  • Authorized dealer warranty -- Full manufacturer warranty — no gray market

This product is currently out of stock and unavailable.

🔒 100% Secure Checkout

Visa Mastercard American Express Apple Pay Google Pay Klarna Link by Stripe
Free Returns 30-day hassle-free returns.
Free Delivery Every order, every time.
Ships in 3–5 Days Heavy-duty crating included.
4.9/5 Stars 2,400+ verified reviews.

In the box

  • Kelvin Aerolite 30 Sleeping Bag
Kelvin Aerolite 30 Sleeping Bag
Kelvin Aerolite 30 Sleeping Bag — Warm-When-Wet 30°F Camp Layer

Warm-When-Wet Insulation for Full-Season Backcountry Hunts

The Kelvin Aerolite 30 is a field-tested sleeping bag built for active camp time, cold glassing sessions, and midnight nature calls in wet conditions. PrimaLoft® Gold Insulation with Cross Core™ technology delivers down-like warmth that stays effective when soaked — a critical advantage on multi-day backcountry elk hunts where dry gear isn't guaranteed. At 38 oz., this wilderness-grade bag features zippered armholes and a stowed walking hook, functioning as a wearable layer over your SITKA system. ISO 23537 rated to 30-degree comfort.

FREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORT
PrimaLoft Gold Insulation
Warm When Wet
30-Degree Comfort
Wearable Design
38 oz.
Total Weight
30°F
Comfort Rating
6'6"
Max Length (Long)
Synthetic Insulation That Doesn't Quit When Your Camp Gets Wet

Synthetic Insulation That Doesn't Quit When Your Camp Gets Wet

Down insulation looks impressive until it clumps in a rain-soaked elk camp on day four. The Kelvin Aerolite 30 uses PrimaLoft® Gold with Cross Core™ technology — synthetic insulation infused with silica aerogel that retains warmth even when moisture infiltrates your shelter. This is the kind of field-tested performance Hunt Premium evaluates before stocking anything. We don't carry sleep systems we wouldn't trust through a week of wet backcountry conditions. The 30-degree ISO 23537 comfort rating pairs with your SITKA layers for full-season reliability. At 38 oz, it compresses small enough to earn its spot in your pack without sacrificing the thermal security that separates a productive hunt from a miserable one.

Wearable Design for Cold Glassing Sessions and Camp Duty

Wearable Design for Cold Glassing Sessions and Camp Duty

The Aerolite 30 isn't a traditional mummy bag — it's a camp layer with zippered armholes, contoured shoulders, a shaped hood, and a center-front two-way zipper. When you're glassing a burn at dawn in 25-degree temps, you can wear it like a coat while your arms operate binoculars. The stowed hook at the bottom connects to a midlength interior loop, shortening the bag so you can walk around camp without tripping over excess fabric. Regular fits up to 6 feet; Long fits up to 6'6". This is season-after-season gear designed for hunters who spend more time active in camp than lying flat.

DWR-Coated Shell for Wet-Condition Backcountry Confidence

DWR-Coated Shell for Wet-Condition Backcountry Confidence

A durable water repellent finish on the outer shell resists precipitation from condensation inside a tent wall or drizzle during an unplanned bivy. Combined with synthetic insulation that doesn't lose loft when damp, the Aerolite 30 is built for the realities of western hunting — where dry camps are the exception, not the rule. The 35% recycled insulation with silica aerogel adds thermal efficiency without adding weight, keeping the total at 38 oz. This isn't a bag that performs in a climate-controlled lab. It's a rugged sleep system engineered for the conditions you actually hunt in — rain, frost, and humidity included.

Sizing & Fit Guide

Select your size based on your height and the layers you'll wear inside the bag as part of your SITKA clothing system.

  • Height 6'0" or under — select Regular
  • Height over 6'0" up to 6'6" — select Long
  • Designed to layer over your SITKA clothing system for colder conditions

Built for the Field

This bag is designed to function as an extension of your hunting clothing system, not just a stationary sleep layer.

Backcountry Camp
Cold Glassing Sessions
Midnight Nature Calls

Full specifications

At a glance

Surface
Durable water repellent finish
Warranty
See product page
Full specifications10 data points across 4 categories

Dimensions

Regular Lengthup to 6'
Long Lengthup to 6'6"
Weight38 oz.

Power & Performance

Comfort Rating30-degree
StandardISO 23537

Materials

InsulationSynthetic PrimaLoft® Gold Insulation with Cross Core™ technology
Recycled Content35% recycled
AerogelInfused with silica aerogel
FinishDurable water repellent finish

Compliance & Warranty

WarrantySee product page

The Hunt Premium Promise

Every product we carry is vetted for real hunting performance. If it doesn't hold up in the backcountry, it doesn't make the cut.

Authorized DealerFull manufacturer warranty honored on every product — no gray market risk.
Free ShippingShips free with fully insured delivery and signature required.
30-Day ReturnsReturn within 30 days in original packaging if it doesn't meet your standards.
★★★★★
“I wore this bag like a coat for three hours of dawn glassing on a September elk hunt in Idaho. Temps dropped to 28 degrees and I stayed warm with just a base layer underneath. Rained hard on day two and the insulation didn't clump at all. This is the most versatile piece of camp gear I own.”
F
First L.Boise, ID

The 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.

FEATURES:

  • Reg: up to 6′
  • Long: up to 6’6″
  • Kelvin Aerolite 30 Sleeping Bag weight: 38 oz.
  • 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
  • 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 midlength 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 footbox provides even warmth around your feet
  • 20-denier polyester face and backer
  • Center-front two-way zipper
  • Imported

Additional information

Color

Subalpine
Size

Long, Regular

Reviews

There are no reviews yet.

Be the first to review “Kelvin Aerolite 30 Sleeping Bag — Warm-When-Wet 30°F Camp Layer”

Your email address will not be published. Required fields are marked *

Frequently Asked Questions

The 30-degree ISO 23537 comfort rating is designed to work with your SITKA clothing layers. In a base camp at 8,000 feet in October, wearing a Kelvin Active Jacket underneath turns this into a system rated for colder conditions. If you're sleeping in exposed bivy situations below 20 degrees, you'd want a lower-rated bag. For most tented backcountry camps where you're layering appropriately, the Aerolite 30 covers early September through late October in most western elk country.
Down loses loft — and therefore warmth — when it gets damp. In backcountry elk camps, condensation, rain, and sweat are constants. PrimaLoft® Gold with Cross Core™ technology retains thermal performance when wet, which is the difference between a restful night and shivering until dawn. The silica aerogel infusion achieves compressibility that approaches down while maintaining that wet-weather reliability. For hunters who've watched a down bag turn into a cold, clumpy mess on day three of a wet hunt, synthetic is the field-tested answer.
A stowed hook at the bottom of the bag connects to a midlength interior loop. When engaged, it shortens the bag so you can walk around camp without the bottom dragging on the ground or tripping you in the dark. Combined with the zippered armholes, you can wear this bag like a coat while making coffee, checking trail cameras, or glassing from a ridge. It's designed for hunters who don't want to fully undress from their sleep system for every midnight task.
Yes. Hunt Premium is an authorized dealer for every brand we carry. Your Kelvin Aerolite 30 ships with full manufacturer warranty support — no gray-market risk, no voided coverage if something goes wrong. Every product on our site comes through authorized distribution channels, which means you're covered if a zipper fails or insulation shifts. That's not a footnote for a purchase at this level — it's a prerequisite.
Regular fits up to 6 feet. Long fits up to 6'6". If you're between sizes or broader in the shoulders, the Long gives you extra room to layer clothing underneath without compressing the insulation. Keep in mind this is designed as part of the SITKA clothing system — you'll be wearing base layers and potentially a mid-layer inside it. If you're 5'11" and plan to wear a Kelvin Active Jacket inside, the Regular still works, but the Long adds breathing room for colder setups.
Hunt Premium offers a 30-day return window. The bag must be unused, in original packaging with all tags attached. Mount it on your sleeping pad after 30 days, or send it back on us. We want you to commit to gear that fits your system, not guess and hope. If you're unsure whether the Aerolite 30 is right for your hunting conditions, call us first. Our free pre-purchase consult covers sleep system pairing, temperature expectations, and layering strategy.
SKU: 20-40086-SA-RGL Categories: , Brand:

The Hunt Premium Promise

Every product we carry is vetted for real hunting performance. If it doesn't hold up in the backcountry, it doesn't make the cut.

Authorized Dealer Full manufacturer warranty honored on every product — no gray market risk.
Free Shipping Ships free with fully insured delivery and signature required.
30-Day Returns Return within 30 days in original packaging if it doesn't meet your standards.

Related products

About sitka gear Hunting Gear

sitka gear is a trusted manufacturer of premium hunting gear. HuntPremium is an authorized dealer offering the full sitka gear lineup with free delivery, price match guarantee, and expert support.

View all sitka gear products →

Related Categories

Accessories 100 products Bags 62 products Base Layers 49 products Bino Accessories 43 products Binoculars 108 products Bipods & Tripods 36 products
Join the Grill Island Community

Expert Picks, Straight to Your Inbox

No spam. Just the gear worth knowing about.

No spam. Unsubscribe anytime.