Tom Bihn Aeronaut 45 review

The Aeronaut 45 is for travelers who pack a little extra but still want to meet most airline carry-on limits, as Tom Bihn puts it. It is the largest bag here at 45 liters, with dimensions of 21.9 x 14 x 9.1 inches, so it is a touch deeper than the common 22 x 14 x 9 inch sizer. It is also light: 3 lb 1 oz in 1050D ballistic nylon, or 2 lb 10 oz in 420D Spectron. The design is a duffel first. A U-shaped main opening makes packing easy, and two expandable end pockets with a removable divider fit up to size 12 shoes or hold laundry. Edgeless shoulder straps stow away, and a removable foam back panel adds comfort in backpack mode. Tom Bihn makes it in Seattle, backs it with a lifetime guarantee and 60-day returns. The trade-offs: no hip belt or laptop sleeve is listed, and the $40 shoulder strap is extra.

Who it is for

Travelers who pack a little extra and want a lighter, flexible bag they can carry three ways.

Price

$355.

Overview Features Why Tom Bihn Reviews From our Community $355
Quoted from the vendor pricing page on November 9, 2026.

Key features

• 45 L volume at 21.9 x 14 x 9.1 in.
• Three carry modes: backpack, duffel or shoulder bag
• U-shaped main compartment opening and mesh lid pocket
• Dual expandable end pockets that fit up to a size 12 pair of shoes
• 1050D ballistic nylon exterior, made in Seattle, WA

Strengths and weaknesses

• Strength: Lightest bag here for its size at 3 lb 1 oz in 1050D nylon
• Strength: Most volume on this list at 45 L
• Strength: Lifetime guarantee and 60-day returns
• Weakness: Depth of 9.1 in. is slightly over a 22 x 14 x 9 in. limit
• Weakness: Shoulder strap is a $40 add-on
• Weakness: Product page lists no dedicated laptop sleeve

Key facts

• Volume: 45 L
• Dimensions: 21.9 x 14 x 9.1 in.
• Weight: 3 lb 1 oz (1050D)
• Carry modes: Backpack, duffel, shoulder
• Made in: Seattle, WA, USA
• Warranty: Lifetime guarantee

Where it ranks

Tom Bihn Aeronaut 45 is No. 7 in our Best Travel Backpacks verdict.