Step 01 · Open Flat
Unzip the clamshell
The center zipper opens the bag flat into two spacious clamshell compartments — pack it like a suitcase, with full access to everything.
4 ways to carry
New
Convertible Cabin Bag
The personal item that packs like a suitcase.
Our under-seat personal item that opens flat like a suitcase — a water-resistant 420D Oxford shell and a padded 16" laptop pocket.
COLOR:
Shadow
Fits under the seat
Opens flat to pack
4 ways to carry
Free Shipping $95+
60-Day Free Returns
2 Year Limited Warranty
Convertible Cabin Bag
Shadow · $158
Convertible Cabin Bag
Sale price$158
How It Works
Pack it flat. Carry it four ways.
Step 02 · Board
Slide it under the seat
Sized as a personal item for most US airlines, so it tucks under the seat in front of you and you skip the overhead-bin fight entirely.
Step 03 · Carry
Four ways to carry
Backpack straps clip on and stow into the back panel, a removable shoulder strap, double top handles for briefcase mode, and a trolley strap for your roller.
Who It's For
Built for the way you travel.
Off the plane, into the meeting. Double top handles give you a structured briefcase carry, while a padded 16" laptop pocket with a two-way zipper and a full-width mesh pocket keep your tech organized and accessible.
"Went to San Antonio from Newark for a 5 day work trip. 5 stars! This is the best thing for a short travel trip. Fit a lot in there."
Enough for the long weekend. Two clamshell compartments hold multiple days of clothes — yet it still counts as your personal item, so the carry-on can stay home.
"For its size, you can pack a lot — I took a 5 day getaway trip & it worked great! It fits nicely under the seat in front of you."
The perfect carry-on companion. The trolley strap slides over your roller handle, so it's one thing to push through the airport, not two to juggle.
"This bag was absolutely perfect in combination with a carry-on for a 5-day trip! Even filled to the brim, it fit under my seat with no problem."
Verified reviews
21 reviews,
4.33 stars.
AA
"The best short-travel bag I have right now"
It has quickly become my primary travel bag for short trips. I love the intuitive design and the thought that went into the different modes you can wear it. As advertised, it does fit under the seat in front of you.
DM
"THE solution to your personal item dilemma"
Perfect for a 5-day trip alongside a carry-on. Perfect amount of storage, the clamshell opening made access easy, and my laptop and fragile items stayed protected. Even filled to the brim, it fit under my seat.
VG
"Great for the organized (and the not-so-organized)"
Perfect size and great material. It's so nice to use as a backpack but have it open like a suitcase. Everything is well organized even if he isn't.
Reviewed on Junip
Compare in Detail
Which bag is right for you?
The Cabin Bag, the Roamer Backpack, and the Garment Duffel each pack for a different kind of trip. Here's what sets them apart.
You're viewing
Convertible Cabin Bag
From $158
- Personal item — fits under the seat
- Opens flat — two clamshell compartments
- 16" padded laptop pocket
- Backpack, shoulder, briefcase & trolley carry
- 2.9 lbs
Backpack
Roamer Backpack
From $128
- Carry-on — overhead bin
- Expands from 30L to 35L
- 15" exterior laptop pocket, lockable
- Clip-away shoe & laundry pouch
- 2.5 lbs
Garment Bag
Garment Duffel
From $128
- Carry-on — overhead bin
- Hangs a suit or dress (up to 50R)
- Zips into a duffel — holds 3–5 days
- Two shoe pockets + trolley sleeve
- 2.3 lbs
Why It Works
Designed for the one-bag trip.
Opens flat like a suitcaseTwo clamshell compartments
Opens flat like a suitcase
Two clamshell compartments
The center zipper reveals two spacious clamshell compartments with full access to everything you packed. Pack it flat, close it up, and go.
Four ways to carryBackpack · shoulder · briefcase · trolley
Four ways to carry
Backpack · shoulder · briefcase · trolley
Backpack straps clip to the side loops and stow into the back panel, a removable shoulder strap to grab and go, double top handles for briefcase mode, and a trolley strap for pairing with a roller.
Laptop stays accessibleDedicated 16" padded pocket
Laptop stays accessible
Dedicated 16" padded pocket
A dedicated 16" padded pocket with a two-way zipper, plus a full-width mesh pocket for tech organization.
Fits under seatPersonal-item compliant
Fits under seat
Personal-item compliant
Designed for under-seat carry on most major domestic airlines, while still providing enough room to pack multiple days' worth of clothes.
Built to travel light420D Oxford shell · 2.9 lbs
Built to travel light
420D Oxford shell · 2.9 lbs
A water-resistant 420D Oxford polyester shell with a water-resistant Taslan lining — all at just 2.9 lbs.
Specs & Details
The technical bit.
Dimensions
17" L × 13" H × 8" D
Volume
28 liters
Weight
2.9 lbs
Laptop pocket
Fits up to 16"
Shell
420D Oxford polyester
Lining
Water-resistant Taslan
Airline fit
Personal item, most US airlines
Carry modes
4 modes
Materials & care
Shell: water-resistant 420D Oxford polyester. Lining: water-resistant Taslan. Care: spot clean with gentle dish soap and water.
What's inside
Two clamshell compartments, a padded 16" laptop pocket with a two-way zipper, a full-width mesh pocket, pack-away backpack straps, a removable shoulder strap, double top handles, and a trolley strap.
Shipping
Free shipping on orders $95+. Standard shipping arrives within 3–5 business days. Express and 2-day shipping available.
Returns & exchanges
Return or exchange, unused, for any reason within 60 days of purchase. Contact Halfday for a free, prepaid return label.
Common Questions
Got questions?
Will it really fit under the seat?
It's sized as a personal item — 17" × 13" × 8" — and is compliant with most US airlines. Reviewers confirm it fits under the seat even when filled to the brim.
How does it open?
A center zipper opens the bag flat into two spacious clamshell compartments, so you can pack it like a suitcase with full access to everything.
What are the four ways to carry it?
Pack-away backpack straps that stow into the back panel, a removable shoulder strap, double top handles for briefcase mode, and a trolley strap that slides over a roller handle.
Does it fit a laptop?
Yes — a dedicated padded pocket with a two-way zipper fits up to a 16" laptop, and a full-width mesh pocket keeps the rest of your tech organized.
What's your return policy?
Return or exchange, unused, for any reason within 60 days of purchase. Contact Halfday for a free, prepaid return label.
Stop checking bags.
Carry it all on.
One personal item that packs like a suitcase — and carries four ways.
Free shipping $95+ · 60-day returns · 2 Year Limited Warranty · Carry-on friendly