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🎒 Travel heavy, carry light — the ultimate convertible duffle for unstoppable pros.
The MIER 90L Water Resistant Convertible Duffle Backpack is a rugged, weatherproof bag designed for professionals and active travelers who demand versatility and capacity. Crafted from heavy-duty tarpaulin with reinforced stitching, it offers a massive 90-liter storage space with multiple compartments for organized packing. Its innovative convertible design features hidden adjustable backpack straps and multiple handles, allowing effortless switching between duffle and backpack modes. Ideal for gym, sports, travel, and outdoor adventures, this bag balances durability, comfort, and functionality for those who refuse to compromise.
















| ASIN | B098NJ1QHH |
| Best Sellers Rank | #59,226 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #65 in Sports Duffel Bags |
| Brand Name | MIER |
| Capacity | 90 Liters |
| Closure Type | Zipper |
| Color | Black |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,630) |
| Handle Type | Web Handle |
| Item Dimensions L x W x H | 28"L x 15.15"W x 12.5"H |
| Item Type Name | Duffel Backpack |
| Item Weight | 4.4 Pounds |
| Manufacturer | MIER |
| Material Type | Tarpaulin |
| Number of Compartments | 6 |
| Strap Type | Adjustable |
| Unit Count | 1 Count |
| Water Resistance Level | Water Resistant |
A**R
Perfect for parents who need to be hands free
Perfect bag for parents. I needed to be hands free for my toddler on a flight. The 40L fits Delta carry on size and was PERFECT. I fit both my and my child’s clothes for a 4 day trip, plus 2 pairs of shoes. It’s a giant interior section with not really any pockets but this worked out better for packing shoes and using packing cubes. I was able to be hands free and I have since used it on several other weekend trips just because it fits so much more than my other bags and I now only need to carry one. It’s perfect for a mom with littles. I had no issue carrying it, it was comfortable, the straps didn’t need to be folded in but seemed easy to do, and seemed to balance weight well. Additionally, the waterproof aspect of it makes me so happy, I can wipe off all the travel germs before storage!
S**D
It's a good duffel bag, but a mediocre backpack
I bought the 90L duffel a year ago and so far it has survived four international flights and several road trips with no issues. If you use it as intended, it's a good bag for the price. First of all, it is a duffel bag that happens to have backpack straps, it is not a backpack with duffel handles. What that means is that, while you *can* carry it on your back, doing so with a large load for a long duration is going to be extremely uncomfortable. Also, the straps are a compromise item because they need to be stowable when not in use, so they're held in place with plastic buckles which can fail when abused. Also, if you don't secure and stow the straps before checking the bag at the airport, there's a good chance that the baggage handling machinery is going to rip the straps off. As for organization, this bag is geared towards transportation and storage. It's a single large compartment and a few smaller pockets, it's not really meant for living out of while you're traveling unless you're also using bag organizers. Keeping all that in mind, it's a big, sturdy, water repellent duffel that doesn't take up much space when it isn't in use. My only real complaint is that the zippers don't have lock rings, so I have to run my TSA lock through the pull tabs.
J**O
Best Backpack I’ve had
Super comfortable backpack with lots of pockets and makes the weight seem light. I put all my training gear in here which include mma gloves, 16oz boxing gloves, shin guards, focus paddles, focus mitts, spare clothes/dirty clithes
J**I
Great bag and excellent Value
★★★★☆ A Tough Tank of a Travel Bag! This MIER duffel is a beast - built like a tank with heavy-duty tarpaulin that laughs at rough handling and rain. The massive D-shaped opening and mesh organizer pockets make packing a breeze, while the backpack conversion option adds fantastic versatility. I've stuffed a week's worth of gear in here with room to spare. Only knocked one star off because while the straps are decent, they could use more padding for heavy loads, and I really wish it had a waist strap for better support. Still, for the price, you're getting an incredibly durable, versatile bag that's ready for any adventure you throw at it.
S**N
Durable and easy to carry
Durable and functional for sure. When properly packed they hold a lot of stuff. Strap on your back like a backpack so easy o carry
B**Z
Quality bag
The storage capacity was just right for the size of bag I was looking for. Material is of good quality thickness and proper strap length for easy transport.
D**E
Very durable
I use this to put all my climbing gear, rope and climbing saddle I strap my spurs on the outside, so I can carry everything on my back and still have my hands-free while walking through the woods very comfortable all around good bag
J**Y
I'd buy it again.
Gave this as a gift last year and I have to say, it's really held up nicely. Good looking duffle that easily converts to a backpack. Great capacity, handsome, durable, comfortable to carry or wear. Buy with confidence.
D**I
No arrepiento de esta compra, SUPER BUENA MOCHILA
R**K
The bag is a straight forward and logical design for overnight, short trips, sports gear. The bag has heaps of handles and a built in back pack so I have found it perfect for my sailing gear and overnight trips.
O**1
Buena y funcional pero no aguanto el viaje en avión y se arruinó
W**N
This is a heavy duty bag that I used as a luggage carrier /backpack to Mexico . Its very strong and versatile and had no problem with 50 pounds of weight.
A**R
I bought this bag for my ice hockey equipment. I wasn't sure if 90L would be enough but my adult gear fits perfectly, not a lot of spare space after jersey, socks and base layers but just enough. That also means it's full so it keeps its shape as a backpack. I've used this for 3 games, two travelled by car and one I walked 25 mins rack way to the rink. The bag is holding up well so far. The backpack straps don't show any signs of ripping off yet. The material is shower resistant so good for walking in the rain or damp changing room floors. The internal pockets are two end mesh and a small central mesh, I keep tapes, laces etc but they're not that large. The internal space is a big cavernous hole. All in all I'm pleased with my purchase, it does exactly what I wanted, seem good quality and I'd recommend for others
Trustpilot
3 days ago
1 month ago