Black | Zipsak Boost! Underseater Expands To Carry-On

Zipsak Boost! Underseater Expands To Carry-On

Name: Zipsak Boost! Underseater Expands To Carry-On
Brand: Biaggi
SKU: 631115-BK
Price: 79.99 USD
Availability: InStock
Rating: 4.2 (176 reviews)

2591 Reviews

~~$229.99~~ $79.99

65% off

Dimensions: 16"x15"x9", Expands to 21"x15"x9"
Weight: 3.85 lbs
Packing Cube Dimensions: 14"x9.5"x5"
Volume expanded: 42 liters

Water resistant nylon fabric

Select color

Black

Variants

Zipsak Boost! Underseater Expands To Carry-On was purchased 36 times in the last 7 days

Loading... People Bought Zipsak Boost! Underseater Expands To Carry-On in the last 7 days

Loading... New Customers happily bought Zipsak Boost! Underseater Expands To Carry-On in the last 7 days

Zipsak Boost! Underseater Expands To Carry-On was purchased Loading... imes in the last 7 days

Zipcube IncludedTrolley SleeveFits Underseat4-Spinner Wheels

Bundle and save 10%

Grey | Ultimate Compression Zipcube (Set of 2)

Ultimate Compression Zipcube (Set of 2)
$49.99 ~~$94.99~~

Select color

Variants

Our expandable under-seat carry-on is an extremely versatile bag that starts off as a small easy-to-store pouch, and opens to become a 4-wheeled carry-on that slides comfortably under the airplane seat in front of you. Need more space? No problem! Your under-seater expands a full 5" upwards, to become a full sized TSA approved carry-on! An extra-deep packing cube is included, so you can pack your clothes in the cube, and still have plenty of room for your other carry on items.

Details

Item comes with a custom fitted and extra-deep packing cube.
Durable and water resistant nylon fabric
Rear trolley sleeve, allows you to slide the bag over the trolley handle of a suitcase
4 multi-directional spinner wheels
3 exterior zippered pockets, and two interior mesh zippered pockets
The carry-on can be wheeled or carried using its adjustable cushioned shoulder strap.
Two year warranty

Specifications

Dims: 16"x15"x9", Expands to 21"x15"x9"
Dims Folded: 15"x9"x4"
Weight: 3.85 lbs
Packing Cube Dims: 14"x9.5"x5"
Volume: 30 liters not expanded, 42 liters expanded.
Materials: Exterior fabric: Crinkle Nylon, water and tear resistant
Zippers: Nylon
Care Instructions: Wipe clean with damp cloth.

How it Works

Convenience and ease is always the goal!

Easy To Store

Foldable and easy-to store anywhere. In a drawer, on a shelf, or under a bed.

Opens Into An Underseater

Unfold the bag, use it as an underseater. Roll it, or slide it over a trolley handle. Comes with an extra deep packing cube!

Expands To Become A Carry On

Use the wraparound zipper to turn the bag into a full-sized carry on.

Introducing

Biaggi Bundles

Shop All Bundles

Bundle & Save

Buy the Bundle and Save 20%

~~$229.99~~ $79.99

65% off

Zipsak Boost! Underseater Expands To Carry-On

Select color

4 colors available

Variants

~~$94.99~~ $49.99

47% off

Ultimate Compression Zipcube (Set of 2)

Select color

1 color available

Variants

~~$49.99~~ $29.99

40% off

Zipcubes-Mini Cube Duo

Select color

1 color available

Variants

Build your set

2591 Reviews

297 Questions \ 297 Answers

ask a question

write a review

(2245) (275) (46) (15) (10)

Show all reviews

ask a question

write a review

Thank you for posting a review!

We value your input. Share your review so everyone else can enjoy it too.

Thank you for posting a review!

Your review was sent successfully and is now waiting for our staff to publish it.

Thank you for posting a question!

Please click on the link in the confirmation email we just sent you to submit your question.

Your question will appear on the site once someone answers it.

Reviews (2591)
Questions (297)

Updating Results

04/24/25

Kris K.

04/23/25

I used the underseater fan

I used the underseater fan overnight trip and it wad perfect! The bag is lightweight and easy to manage.

Barbara A.

04/19/25

Zipsak Boost exceeds expectations

I recently bought the Zipsak Boost and used it this week on an overnight trip. It exceeded my expectations. EVERYTHING fit in it. I was happy to roll it along rather than carrying it (my lifting is limited). Those traveling with me were very impressed as well.

Rhetta W.

04/17/25

Needed a bag like this

Needed a bag like this instead of packing a huge (under seat) backpack. Love the idea of the wheels since I also use a cane. Will know more when I take my trip to Las Vegas next month👍

Xenia B.

04/10/25

Rolling along the terminal!

I’m using the bag right now at the airport, ready to fly! I love that it has wheels. . no more lugging a tote over my shoulder!

Sarah W.

04/09/25

Great expandable bag

Love how this has wheels, and how it can zip to different sizes. . . show under your seat on the plane or expands to be a carry-on.

Marsha C.

03/26/25

Ingenious Design

Ingeniously designed and just what I was looking for. I love the fact that it can slip over the handle of my 21" roll aboard when I am carrying one but also has wheels so I don't need to carry it. So many of the ads for other totes show people stuffing them with clothes, shoes, laptops and prancing through an airport as though they weigh nothing. ...Read More

Ha! But this Zipsak Boost! has wheels that make carrying it unnecessary (although of course there is a sturdy strap if you want to do that. I love the expandable compartments. Very pleased with my purchase. Read Less

Jose S.

03/24/25

Fantastic Lugage.

This is the 3rd piece i buy from Biaggi. The 3 of them are wonderful. Last week we took a short trip to Carmel and the planes are small. It’s the first time my wife used one of them and she fell in love. We arte planing a trip to Europe in a few months and for sure we are taking only carry on Biaggi.

Store Owner

03/25/25

===============Publish the review - Type yes/no================no

MARGARET W.

03/17/25

Quick service. Quality product.

Diana M.

03/12/25

Great thank you

Elayne H.

01/05/25

This expandable bag meets all

This expandable bag
meets all of my travel needs. It takes very little storage room so got rid of all my other suitcases! Love it!

Sharon H.

03/06/25

Q: Where are my two pieces I ordered in January? Said delivered but never received them.

Store Owner

03/06/25

A: Hi Sharon,
Can you please email us at customerservice@biaggi.com. Please include your order # and your full shipping name first and last name so we can locate your order and see what happeend.

Kathleen R.

06/13/23

Q: I really want to order this & was not sure if my VISA GIFT CARD could be used ?
Thanks so much for your response!

Store Owner

06/13/23

A: Hi Kathleen,
You absolutely can use a visa gift card as long as the whole amount is on there as we can't process two cards. If you need further assistance you can reach out to us on customerservice @biaggi.com and we will be glad to assist you with an order.

Gail

04/21/23

Q: Did you discontinue the lighter blue?

Store Owner

04/21/23

A: Hi Gail,
Our primary colors are Black, Grey, Navy & Purple.

Theresa

04/14/23

Q: The new carry on requirements are 22x14x9. Will you be making one this size?

Store Owner

04/14/23

A: Hi T\hersa,
Our measurements fit the requirements, The Zipsak is a soft no structured bag.

Lori

04/03/23

Q: Is this a new model? Does it have a trolly strap on the back now?

Store Owner

04/03/23

A: Hi Lori,
The Zipsak boost underset to carryon has a sleeve on the back to put over a trolley handle
biaggi.com/collections/zipsak/products/zipsak-micro-fold-expandable-underseater-zipcube

Joan E.

03/31/23

Q: does it have a telescoping handle if I use it as my main suitcase?

Store Owner

03/31/23

A: Hi Joan,
The only Zipsak with a trolley handle is the one: The New Zipsak with Trolley:
biaggi.com/collections/lift-off/products/new-zipsak-with-trolley-handle

Debbie

03/30/23

Q: Hello, On the Zipsak Boost Expandable, is the side exterior zippered pocket able to hold a water bottle? Thanks!

Store Owner

03/30/23

A: Hi Debbie,
There is no pocket for water on the exterior, my apologies.

Celina

03/17/23

Q: I'm traveling to Europe and the european airlines portion of my trip restrict the size of a personal bag under the seat to 45cmx36cmx20cm (17.7x14.1x7.8). I love the idea of purchasing this as my personal bag but I'm afraid it will not fit within their restrictions, so I purchased the backpack. I'm really disappointed because this would have been much better and would have worked for the American Airlines portion, just not the European Airline portion. Is this a structured 9" depth?

Store Owner

03/17/23

A: Hi Celina,
You would have been okay with the Zipsak Boost underseat as a personal item and it is a soft non structured bag.

Lisa

03/14/23

Q: I love this idea but how does this fit under an airline seat? I checked space on 20 airlines and it wouldn’t fit on any of them. Most airlines could fit 16x12x6.

Store Owner

03/14/23

A: Hi Lisa,
We do not have no issues with our measurements, the Zipsak is a soft structured bag,

Maria R.

02/25/23

Q: Is this an updated version?
I’ve had mine for a few years and it’s hard to roll along, slip over a larger suitcase and not very stable when pulling

Store Owner

02/28/23

A: Hi Maria,
This is the same bag and we do have suggestions on how to pack.

You should pack the ZipSak from the bottom up placing your largest and heaviest items at the bottom and then work your way up to the smallest and lightest objects. As you pack, make sure that the items are evenly distributed around the bag so it stands up straight. The best way to do this is to use packing cubes that will fit perfectly inside your bag. Small ZipCubes for the 22" ZipSak and ZipSak Boost Under Seat bag, Medium ZipCubes for the 27" ZipSak and Large ZipCubes for the 31" ZipSak and the ZipCube MAX XL ZipCubes for the ZipSak Boost MAX. These make packing a breeze and will give your bag the structure it needs to stand up straight and roll evenly.

If you have a shorter ZipSak use the shoulder strap to lengthen the handle of the bag so it's more comfortable to pull. Pull the bag on all 4 spinners besides you, do not tip it and drag behind you. The bags are designed to roll on all 4 wheels.

I hope these suggestions help.

Nancy G.

Smart luggage

This is the versatility I wanted in a carry on. A bag that expands as I buy things so I start small and end big!

On Biaggi (Shopify)

Tall G.

Compression Packing Cubes are worth the money!

I just replaced my inexpensive, flimsy packing cubes with Biaggi's compression packing cubes. What a difference! They are well-made and substantial. The compression feature will save space. I can't wait to travel with them!

Donna W.

04/18/25

Great bag, able to pack

Great bag, able to pack everything I need for a weekend trip!

Lynne S.

Great company!

Always great talking to those at Biaggi. My strap was perfect. Thank you!

Angela f.

Haven’t had a chance to

Haven’t had a chance to try out yet but so far I am impressed with the quality of the packing cubes and the suitcase and the way it rolls so smoothly!

Linda R.

Incredible Products

Wonderful, outstanding products!!!
I have loved Biaggi for years and years and years!!!
AND their products last that long without any signs of wear and tear!!!

Kazuyo S.

Foldable backpack

I have several products. This backpack did not disappoint me. I like the feature of foldable into a small pack. Very satisfied😊

Crystal D.

His All My Criteria for Travel

I love how sleek it the piece looks and its really compact & functional! Absolutely love it

Chaimson

04/16/25

A pleasure to work with Biaggi!

Very good quality products.

Margaret

04/15/25

Bundle backpack and bag

I had been looking at this backpack for weeks. I’m going to Greece and only taking carry on and backpack so I’m being real picky about the backpack. This one loooks like it will hold a lot and stay organized without being bulky. I bought the bundle pack and got the bag just because it looks like a great extra bag to stow in my suitcase.

Zipsak Boost! Underseater Expands To Carry-On

How it Works

Biaggi Bundles

Bundle & Save

WRITE A REVIEW

ASK A QUESTION

SHOP

COMPANY INFORMATION

USEFUL TIPS & INFORMATION

NEWS & UPDATES

FOLLOW US

Quick links

Zipsak Boost! Underseater Expands To Carry-On

How it Works

Biaggi Bundles

Bundle & Save

WRITE A REVIEW

ASK A QUESTION

Newsletter

SHOP

COMPANY INFORMATION

USEFUL TIPS & INFORMATION

NEWS & UPDATES

FOLLOW US

Quick links

These are real reviews from real shoppers

WRITE A REVIEW

These are real reviews
from real shoppers