ILE Radius vs. Attitude Supply ATD1 Backpack

Two carry-on travel backpacks, compared spec for spec.

ILE Radius

by ILE
Front facing view of the ILE Radius
Capacity21 L
Weight0 kg
Dimensions48×28×15 cm
Airline fit93%
Price$200

Feature by feature

ILE RadiusFeatureAttitude Supply ATD1 Backpack
Storage
N Compression 4
None Expanded Capacity 55L
4 Opening 1
front Passport front
N Passthrough N
Carry
Y Backpack Y
N Hip Belt removable
removable Sternum Strap removable
Inside
16in Laptop 16in
2 Main Compartments 2
N Organizer Y
Outside
× Hard Shell ×
N Rain-fly N
2, side Water Bottle Holder 2, side
Y Water Resistant Y
Material
1000D Cordura or xpacChallenge Sailcloth Ecopak® EPLX600

Attitude Supply ATD1 Backpack

Front facing view of the Attitude Supply ATD1 Backpack
Capacity23 L
Weight1.7 kg
Dimensions50×30×26 cm
Airline fit17%
Price$523

Key differences between the ILE Radius and Attitude Supply ATD1 Backpack

Both have: passport pocket, backpack straps, sternum strap, laptop sleeve, water bottle pockets, water resistant.

Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 32 accept both. 144 accept only the ILE Radius, and 0 accept only the Attitude Supply ATD1 Backpack.

Only the ILE Radius fits

Aegean Airlines, Aer Lingus, Aeroflot, Aerolineas Argentinas, Aeromexico, Air Asia, Air Astana, Air Baltic, Air Canada, Air Caraibes, Air China, Air France, Air India, Air Macau, Air Malta, Air Mauritius, Air Niugini, Air Nostrum, Air Serbia, Air Seychelles, Air Wisconsin, AirAsiaX, Alaska Airlines, All Nipon Airways, Allegiant Air, American Airlines, ANA, Asiana Airlines, ATA Airlines, Atlas Global, Austrian, Avianca , Azerbaijan Airlines, Bahamasair, Bangkok Airways, Belavia, Biman Bangladesh, Blue Air, Boliviana de Aviacion, British Airways, Brussels Airlines, Bulgaria Air, Cambodia Angkor Air, Cathay Pacific, Cayman Airways, Cebu Pacific, China Airlines, China Eastern, CommutAir, Conviasa, Czech Airlines, Delta Airlines, Dragonair, EL AL, Emirates Airlines, Enter Air, Ethiopian Airlines, Etihad Airways, Eurowings, EVA Air, Fiji Airways, Finnair, Flair Air, flybe, Garuda Indonesia, Gol Linhas Aereas, Great Lakes Airlines, Hawaiian Airlines, Hong Kong Airlines, Iberia, Icelandair, Indigo, InselAir, Interjet, Iran Air, Iran Aseman Air, Japan Airlines, Jet Airways, Jet2, jetBlue Airways, Jetstar Airways, Jetstar Asia, Juneyao Airlines, Kenya Airways, KLM, Kulula, Kuwait Air, LATAM , Liat Airlines, LOT Polish, Lufthansa, Luxair, Mahan Air, Malaysia Airlines, Mango, Meridiana Fly, Mesa Airlines, Middle East Airlines, Monarch Airlines, Nordwind Airlines, Norwegian, Oman Air, Onur Air, Pakistan International, Peach, Porter Airlines, Qantas Airways, Qatar Airways, Regional Express, Republic Airways, Royal Brunei Airlines, Royal Jordanian, Ryanair, S7, SAS Scandinavian, Scoot, Shandong Airlines, Shenzhen Airlines, Sky Airlines, Skywest, Inc., South African Airways, SriLankan Airlines, Sun Express, Swiss Int'l Air Lines, TAP Air Portugal, TAROM, Thai Airways, Tianjin Airlines (A320 & E190), Tiger Airways, Trans States, Travel Service Airlines, TUI, Turkish Airlines, Ukraine International, United Airlines, Uzbekistan Air, Vietnam Airlines, VIM Airlines (Closed), Virgin Atlantic, Virgin Australia, Volotea, WestJet, WOW Airlines, Xiamen.

ILE Radius vs. Attitude Supply ATD1 Backpack: which should you pack?

The Attitude Supply ATD1 Backpack carries 2L more than the ILE Radius (21L vs. 23L), and the two are closely matched on weight. For carry-on flexibility, the ILE Radius fits 93% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Attitude Supply ATD1 Backpack; if you want to travel lighter, the Attitude Supply ATD1 Backpack is the better call.