The Shasta 23L Cooler
The Shasta 23L Cooler
The Lightest Backpack Cooler Ever
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The Shasta is our flagship cooler - the biggest, best Monti Cooler we make still folds down tiny to fit any adventure!
• Keeps drinks cold for up to 55 hours
• 23L Capacity: Holds up to 24 cans or 5 bottles of wine
• Compresses into its built-in stuff sack
• 6x lighter than the competition
• Backpack straps included
• Machine washable
• Leak-proof
Details
Details
Capacity
Holds 24 cans or 5 bottles of wine
**Ice allowance not included
Dimensions
Cooler Open: 20"H x 10"W x 6.5"D
Stuff Sack: 9"H x 9"W x 3.5"D
23 liter capacity
Materials
Ripstop Nylon
Hydrophobic Synthetic Insulation
Waterproof YKK Zippers
Use the roll-top for peak performance and comfort. We also find the product performs best with ice packs rather than ice in higher humidity environments if you are concerned about condensation.
Shipping & Returns
Shipping & Returns
Monti Guarantee: If you're not happy with your cooler return it unused for a full refund in the first 30 days!
Holiday Gift Return: Unused coolers received as gifts, purchased after November 1st, can be returned until January 25th.
Christmas Shipping Deadline: Order's placed on or before December 18th to the continental United States will ship out in time to arrive for Christmas.
Care Instructions
Care Instructions
Easily turn inside out to clean and dry. Hand wash with cold water.
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what is it?
The Travel Cooler That Goes Where Bulky Coolers Can't.
The Shasta is the only packable soft cooler with durable, leak-proof materials which hold ice for up to 55 hours.
It’s 6x lighter than bulky hard coolers but carries up to 24 cans, making it perfect for travel!
The Shasta is built to survive sand, boats, flights but also grocery runs and everyday activities.
How does it work?
Smart Design That Adapts to Your Day
Simply open it up and put in your drinks, snacks, ice, cans or wine.
Wear it as a backpack to enjoy hands-free travel then compress it into itself for easy portability when done.
It’s easy to clean, fully machine-washable and naturally stain-resistant.
Why you need it
Make Every Day Out Feel Effortless
Life feels better when a big, bulky cooler isn’t holding you back.
The Shasta removes that burden, so you can experience true freedom while sharing a cold drink with friends.
The Travel Cooler That Goes Where Bulky Coolers Can't.
The Shasta is the only packable soft cooler with durable, leak-proof materials which hold ice for up to 55 hours.
It’s 6x lighter than bulky hard coolers but carries up to 23 cans, making it perfect for travel!
The Shasta is built to survive sand, boats, flights but also grocery runs and everyday activities
Smart Design That Adapts to Your Day
Simply open it up and put in your drinks, snacks, ice, cans or wine.
Wear it as a backpack to enjoy hands-free travel then compress it into itself for easy portability when done.
It’s easy to clean, fully machine-washable and naturally stain-resistant.
Make Every Day Out Feel Effortless
Life feels better when a big, bulky cooler isn’t holding you back.
The Shasta removes that burden, so you can experience true freedom while sharing a cold drink with friends.
Shop NowFAQs
Frequently Asked Questions
How fast will my order ship?
Orders usually leave our warehouse within 1–2 business days. Standard U.S. shipping takes 3–5 business days, and we offer expedited options at checkout if you need it sooner.
Do you ship internationally?
Yes! We ship worldwide. International delivery times vary depending on the destination, but most orders arrive within 7–14 business days.
What's your return policy?
If you don't love your Monti cooler, return it within 30 days for a 50% refund — no hassle, no hard feelings.
What if my cooler arrives damaged or defective?
Reach out to our support team and we'll replace it right away. Every Monti product is covered against defects.
How long does Monti keep drinks cold?
Independent testing by Outdoor Life found Monti coolers held ice for up to 55 hours — on par with heavy-duty hard coolers, but at a fraction of the weight.
Is it really leakproof?
Yes. Each cooler uses a seam-welded liner that prevents leaks — even when tipped on its side.
What's the material?
The shell is made of quilted, PFAS-free nylon with reinforced stitching. It's soft, durable, and stylish enough to take anywhere.
Will condensation be a problem?
In humid environments, we recommend ice packs instead of loose ice for best results. That way you get long chill time without excess moisture.
Is it TSA or carry-on approved?
Yes — all Monti coolers fold into their built-in stuff sack and fit easily in carry-ons, backpacks, or totes. No oversized baggage fees here.
How small does it pack down?
The Shasta compresses into a 9" x 9" x 3.5" sack — smaller than a hoodie. The Mayfly packs down even smaller.
Can I fit it under an airplane seat?
Yes. Customers regularly bring Monti coolers on flights — they fit under seats and in overhead bins when packed flat.
Does it add much weight to my luggage?
Not at all. The Shasta weighs only 17 oz (about as much as a water bottle).
Is this good for hiking or camping?
Absolutely. Lightweight design and backpack straps make it perfect for trails, day hikes, or car camping trips.
Can I take it on a boat or to the beach?
Yes. Monti coolers are leak-resistant, sand-friendly, and easy to rinse clean after saltwater use.
Is it useful for parents?
Many parents use Monti coolers for park days, sports practice, or road trips — it keeps snacks and drinks cold without the bulk of a hard cooler.
Can I use it for tailgate or college events?
Yes! The Shasta holds up to 23 cans and keeps them cold all game day.
Does it works for everyday errands?
Definitely. Monti coolers double as grocery bags, lunch totes, or even as an insulated carrier for wine or flowers.
What's the difference between Shasta and Mayfly?
The Shasta (23L) is our largest cooler — it holds up to 23 cans or 5 bottles of wine, perfect for group trips. The Mayfly (14L) is smaller and lighter, ideal for day trips or solo adventures.
What about the Adventure Diaper Bag?
The Adventure Bag is designed for parents on the go. It includes an insulated bottle pouch, smart storage, and stroller hooks — combining Monti's cooling tech with parenting convenience.
How much does each cooler weigh?
Shasta: 17.2 oz. Mayfly: 14.7 oz. Both are lighter than most water bottles.
How do I pick the right size?
If you're traveling with family or groups, go with the Shasta. For solo adventures or carry-on minimalism, the Mayfly is perfect. Parents who want versatility should check out the Adventure Bag.
Can I own more than one?
Many customers do! Shasta for bigger trips, Mayfly for everyday runs, Adventure Bag for family needs.
Monti Coolers Size Comparison
Shasta 23L vs. Mayfly 14L
The only difference between the Shasta and Mayfly is the size of the cooler.
Real Customers. Real experiences.
Loved by People Who Live On the Go
See The Shasta In Action
Built for Every Kind of Adventure
Beach & Park Days
Perfect for Picnics & Beach Days! Pack snacks, wine, and cold drinks - no heavy cooler required.
Hiking & Trails
Light enough for miles of hiking, strong enough to keep drinks cold until you reach the view.
Travel & Weekends Away
Folds into your luggage, opens into a full-size cooler. Zero hassle, maximum freedom.
Live Lighter, Go Further
Freedom to Go Anywhere
Packable
Compresses into its built-in stuff sack for easy storage.
Straps
Keep your hands free on hikes with our backpack straps.
Ultra-light
Enjoy your cooler without being held back by luggage.
Durable
Explore without worrying about leakages or stains.
Engineered for Real Adventures
Why The Shasta Outperforms Every Other Cooler
55hrs
of Ice Retention
Independent testing found that 7lbs of ice lasts over 55 hours.
6x
Lighter
At just 17.2 oz, The Shasta weighs less than a water bottle.
23
Can capacity
The Shasta can hold up to 24 cans or 5 wine bottles.