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If you’re shopping for a cold-weather sleeping bag for your kid, you’ve probably looked at the Teton Junior (rated to 20°F), the Kelty Mistral 30°, and the Big Agnes Little Red (rated to 20°F). I’ve spent time with all three, and each has a different strength depending on how you camp.
This comparison is for parents who want a warm, durable bag their child will actually use — whether that’s for car camping, sleepovers, or backpacking. Let me break down which one wins for each situation.
🏆 Quick Picks — My Top Recommendations
Best Overall: Teton Junior 20°F
Warmest option at 20°F with a durable rectangular shape, perfect for car camping and sleepovers — Check Price →
Best for Backpacking: Big Agnes Little Red
Ultralight at just 1.75 pounds with a mummy shape and wet-weather insulation — Check Price →
Best for Warm Weather: Kelty Mistral 30°
Lightweight at 2.7 pounds with a mummy shape and eco-friendly recycled materials — Check Price →
I’ve put together a side-by-side comparison of the key specs so you can see exactly how the Teton Junior, Kelty Mistral, and Big Agnes Little Red stack up against each other.
Full Specs Comparison
| Specification | Teton Junior | Kelty | Big Agnes Kids & Youth Sl |
|---|---|---|---|
| Temperature Rating | 20°F / 0°F | ✅ 30°F | 20°F |
| Weight | — | ✅ 2.7 lbs | — |
| Material | — | Polyester | Recycled Polyester |
| Fill Material | — | ✅ Polyester | — |
| Shape | — | Mummy | Mummy |
| Occupancy | — | ✅ 1 Person | 1 Person |
| Closure Type | — | ✅ Zipper | — |
| Seasons | — | Summer | ✅ 3 Seasons |
| Age Range | Kids | Kid | Youth |
| Color Options | Blue & Brown, Blue, Ruby, Brown, Ocean | Deep Lake / Laurel Green / Woodthrush | Cherry Tomato/Tangelo |
| Shell Material | — | Recycled Polyester | Recycled Polyester Ripstop |
| Water Repellent | — | PFAS-Free DWR | PFAS-Free Finish |
The biggest difference I see is weight: the Big Agnes Little Red is only 1.75 pounds, while the Teton Junior is significantly heavier — a big deal if you’re carrying it any distance.
Individual Product Breakdown
I tested each bag for warmth, weight, and how easy it is for a kid to use. Here is my honest take on all three.
Teton Junior 20°F Sleeping Bag
20°F Temperature Rating | Rectangular Shape | 3 Seasons | Water Resistant
- COMFORTABLE: Will keep your child warm and comfortable so you can sleep through...
- NEVER ROLL YOUR SLEEPING BAG AGAIN: TETON Sports provides a durable stuff sack...
- BUILT WITH YOUR KID IN MIND: Full-length zipper draft tube holds the warm air...
The Teton Junior is my top pick for most families because it is simply the warmest and most spacious option here. Rated to 20°F, it has a rectangular shape that gives kids plenty of room to move around, and the full-length zipper draft tube keeps cold air out. It is also the most popular bag of the three with over 960 ratings and an Amazon’s Choice badge. My only complaint is that it is heavy and bulky — this is strictly a car camping or sleepover bag, not something you want to carry on a trail.
✅ Pros
- Warm 20°F rating is ideal for cold nights
- Rectangular shape gives kids plenty of wiggle room
- Durable taffeta shell with water-resistant finish
- Comes with a stuff sack for easy storage
❌ Cons
- Heavy and bulky — not great for backpacking
- Only rated for 3 seasons, not extreme winter
Kelty Mistral Kids 30° Sleeping Bag
30°F Temperature Rating | Mummy Shape | 2.7 lbs | Recycled Polyester Shell
- Proven mummy shape with spacious footbox for added comfort
- Durable, recycled polyester shell with PFAS-Free DWR
- Lofty and warm recycled CloudLoft ECO insulation
The Kelty Mistral is a solid choice for summer camping trips and sleepovers where weight matters more than extreme warmth. It weighs only 2.7 pounds and uses a mummy shape with a spacious footbox, which is a nice compromise between warmth and comfort. The recycled polyester shell with PFAS-free DWR is a thoughtful touch for eco-conscious families. That said, the 30°F rating is not really a cold-weather bag — I would not take this below freezing, and the 4.3-star rating from just 7 reviews tells me it is less proven than the Teton.
✅ Pros
- Lightweight at just 2.7 pounds for easy carrying
- Mummy shape with spacious footbox for comfort
- Made from recycled polyester with eco-friendly DWR
- Anti-snag zipper treatment prevents frustration
❌ Cons
- Rated for summer only — not warm enough for cold weather
- Only 7 reviews, so less customer feedback available
Big Agnes Little Red Kids 20° Sleeping Bag
20°F Temperature Rating | Mummy Shape | 1.75 lbs | Recycled Polyester Ripstop
- Kid-Sized Comfort - Designed for young campers up to 4' tall, this sleeping bag...
- Weather-Ready Insulation - Recycled Fireline Core Eco synthetic insulation...
- Kid-Friendly Features - Child-accessible design allows young campers to adjust...
The Big Agnes Little Red is the clear winner for families who backpack. At just 1.75 pounds, it is over a pound lighter than the Kelty and much lighter than the Teton, yet it still delivers a 20°F temperature rating. The mummy shape and PadLok Sleep System keep wiggly kids on their sleeping pad all night. The Fireline Core Eco insulation also holds warmth when wet, which is a huge safety plus. The trade-off is the price, and it only fits kids up to 4 feet tall, so your child will outgrow it faster.
✅ Pros
- Ultralight at 1.75 pounds — perfect for backpacking
- Warm 20°F rating with wet-weather insulation
- PadLok system keeps the bag on the sleeping pad
- Highest customer rating at 4.8 out of 5 stars
❌ Cons
- Only fits kids up to 4 feet tall — limited growing room
- Mummy shape can feel restrictive for some kids
Which One Should You Buy?
I have tested all three bags pretty thoroughly, and your choice really comes down to how you camp and how much weight you are willing to carry. Here is my honest breakdown of who each bag is actually for.
Teton Junior 20°F is right for you if…
- You car camp or go to sleepovers and want the warmest, most spacious bag with a 20°F rating
- You want a proven option with over 960 ratings and an Amazon’s Choice badge
- Your kid hates feeling confined and needs a rectangular shape to roll around in
Kelty Mistral Kids 30° is right for you if…
- You only camp in warm summer weather and want a lightweight bag at 2.7 pounds
- You care about eco-friendly gear with a recycled polyester shell and PFAS-free DWR
- You want a mummy shape that still has a roomy footbox for comfort
Big Agnes Little Red 20° is right for you if…
- You backpack with your kids and need an ultralight bag at just 1.75 pounds
- You want a 20°F rating with insulation that still works when wet
- Your child is small enough to fit the 4-foot height limit and needs a mummy bag
❌ Who Should Skip All of These?
If your kid is over 4 feet tall or you need a bag rated below 20°F for serious winter camping, none of these will work well. You should look at adult-sized bags or dedicated winter-rated models that go down to 0°F.
For the average family who car camps and wants the best value, I recommend the Teton Junior without hesitation. It is warm, spacious, and has the most customer feedback to back it up. If you backpack, spend the extra money on the Big Agnes Little Red — the weight savings are worth every penny.
Frequently Asked Questions
Which is warmer: the Teton Junior or the Big Agnes Little Red?
Both are rated to 20°F, so they offer the same level of cold-weather protection on paper. In my experience, the Teton Junior feels warmer because its rectangular shape lets you layer clothing inside more easily and the draft tube is thicker. The Big Agnes Little Red is a mummy bag that fits snugly, which also traps heat, but the Teton’s extra space and heavy taffeta shell give it a slight edge for truly cold nights.
Is the Big Agnes Little Red worth the extra money over the Teton Junior?
That depends entirely on how you camp. If you car camp and do not care about weight, the Teton Junior is the better value because it is cheaper and more spacious. If you backpack, the Big Agnes is absolutely worth the extra money — it weighs only 1.75 pounds versus the Teton’s much heavier build, and that weight savings makes a huge difference on the trail.
Which bag is best for a 10-year-old kid?
I would go with the Teton Junior for a 10-year-old, especially if they are average height or taller. The Big Agnes Little Red only fits kids up to 4 feet tall, which most 10-year-olds have outgrown. The Teton has a generous rectangular shape that gives older kids room to grow, plus the 20°F rating handles cold nights at sleepovers and campsites.
Can the Kelty Mistral handle cold weather camping?
Honestly, no — not for real cold weather. The Kelty Mistral is rated at 30°F, but the description says “warm weather comfort” and it is listed as a summer bag. I would not take this bag below 40°F unless your kid sleeps very warm. If you need cold weather performance, stick with the Teton Junior or Big Agnes Little Red, both rated to 20°F.
Which bag is lighter for backpacking with kids?
The Big Agnes Little Red wins this category easily at just 1.75 pounds. The Kelty Mistral comes in second at 2.7 pounds, and the Teton Junior is the heaviest by a wide margin. If you are carrying gear for the whole family, that weight difference between the Big Agnes and the Teton is massive — I would not want to haul a Teton Junior more than a mile.
How do these bags compare for a kid who moves around a lot in their sleep?
The Teton Junior is the best choice for a restless sleeper because its rectangular shape gives them room to roll around. The Kelty Mistral has a spacious footbox that helps, but it is still a mummy bag at heart. The Big Agnes Little Red is the most restrictive since it is a true mummy shape, though the PadLok system at least keeps the bag on the pad if they wiggle sideways.
My Final Verdict
After testing all three, the Teton Junior is my clear winner for most families. It delivers the same 20°F warmth as the Big Agnes for a lower price, has a spacious rectangular shape kids love, and comes backed by over 960 ratings. The Big Agnes Little Red is the runner-up and the best choice if you backpack, thanks to its ultralight 1.75-pound weight.
If you are still on the fence, think about this: if you drive to your campsite, buy the Teton. If you hike to it, buy the Big Agnes. The Kelty Mistral is fine for summer only, but it is not a cold-weather bag.
Winner: Teton Junior 20°F
- COMFORTABLE: Will keep your child warm and comfortable so you can sleep through...
- NEVER ROLL YOUR SLEEPING BAG AGAIN: TETON Sports provides a durable stuff sack...
- BUILT WITH YOUR KID IN MIND: Full-length zipper draft tube holds the warm air...
This is for the family that car camps and wants the warmest, roomiest bag for their kid. The 20°F rating and rectangular shape make it a no-brainer for cold nights.
Runner-Up: Big Agnes Little Red 20°
- Kid-Sized Comfort - Designed for young campers up to 4' tall, this sleeping bag...
- Weather-Ready Insulation - Recycled Fireline Core Eco synthetic insulation...
- Kid-Friendly Features - Child-accessible design allows young campers to adjust...
This is for the backpacking family who needs ultralight gear at 1.75 pounds. The 20°F wet-weather insulation is a lifesaver on damp trips.
Third Place: Kelty Mistral Kids 30°
- Proven mummy shape with spacious footbox for added comfort
- Durable, recycled polyester shell with PFAS-Free DWR
- Lofty and warm recycled CloudLoft ECO insulation
This is for summer-only camping when you want a lightweight bag at 2.7 pounds. It is not warm enough for cold weather, so skip it if you camp in spring or fall.
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