Skip to product information
1 of 21

The Mayfly 14L Cooler

The Mayfly 14L Cooler


Regular price $103.20 USD
Regular price $129.00 USD Sale price $103.20 USD
Sale Sold out
Shipping calculated at checkout.

The Mayfly is the smaller of our two coolers.

• Molds to any bag. 
• Packs up to fit in your backpack or tote. 
• Essentials Pocket - Exterior, Zippered
• Holds up to 15 cans, 3 bottles of wine, or a picnic for two!
• Compresses into its built-in stuff sack
• Keeps drinks cold for up to 30 hours
• Patent(s) Pending utility and aesthetics

Black and Blue Coolers come with Included Backpack Straps (available separately for Coral), as well as a Velcro patch for customizing! 

Capacity: 14L (about 15 cans)
Weight: 12oz! 


Shasta: Holds 24 cans or 5 bottles of wine

Mayfly: Holds about 15 cans and tall enough for 3 bottles of wine :)

**Ice allowance not included


Ripstop Nylon
Hydrophobic Synthetic Insulation
Waterproof YKK Zippers


Mayfly: 18"H x 9"W x 5"D
14 liter capacity

Shasta: 20"H x 10"W x 6.5"D
21 liter capacity

Shipping & Returns

Free Shipping in the USA!
Monti Guarantee: If you're not happy with your cooler return it unused for a full refund in the first 30 days!

Care Instructions

Easily turn inside out to clean and dry. Hand wash with cold water.

View full details
  • Truly Portable

  • Free Shipping

  • Hassle-Free Exchanges

Product Walk-Through

Monti Mayfly 14L High Capacity Lightweight Travel Cooler. Folds into built in stuff sack. Packable Cooler Blue.

Sized for the Occasion

The Mayfly (left) holds about 15 cans, or 3 bottles of wine.

The Shasta (right) is big enough for a full day in the sun with a whopping 24 can capacity (about 5 bottles of wine)!

A cooler you'll actually want to carry.

Frequently Asked Questions

How long will it hold ice?

24 Hours!

Truth is, it depends on conditions(110 degrees outside or nice spring day), but we think of Monti as your "All Day" cooler. In tests we've conducted it kept temperatures ice/water below 40 degrees for over 30+ hours in a 70 degree room.

What are the dimensions?

18"H x 9"W x 5"D
14 liter capacity

20"H x 10"W x 6.5"D
21 liter capacity

How do you use the stuff sack?

The stuff sack is built into the cooler itself. The exterior zippered pocket IS the stuff sack. Simply reach into the pocket, grab a big handful of the body of the cooler and start to turn the cooler inside out, pushing the body of the cooler into the inside out pocket you've created. The cooler's convenient stuff sack is seamlessly integrated into its design, making it easy to store and carry.

What is the return policy?

Monti Guarantee: Changed your mind? No problem! Just let us know and you can return your unused cooler for a full refund within the first 30 days of purchase.

Which size should I get?

If you're unsure, consider the Shasta, as it is the most versatile.

The simplest way to decide is by looking at the capacity. The Shasta will never be "too big" because the roll top design ensures that it is compressed down to match the size of what you have inside it. (ie if you have only 6 cans in the cooler, you will roll the top down further). So really it comes down to your needs. Picnic with friends? Shasta. A simple bottle of wine and a few water bottles or a lunch sack for work? The Mayfly is perfect.