Seek Outside Flight 3
Seek Outside Flight 3 is a durable, lightweight and comfortable 52-liter backpack that works well even when carrying heavier loads up to between 16 and 23 kg. The weight of the pack is approximately 1.22 kilograms.
The Flight 3 features a roll-top closure, a large front Ultra Stretch™ mesh pocket and two patented Ultra Stretch™ side water bottle pockets, which securely hold a Nalgene bottle while remaining easy to reach.
The main difference between the Flight series and Seek Outside's other backpacks is the carrying system. The carrying system on Flight 3 is lighter than on Seek Outside's larger bags, but is still adjustable and very comfortable. The carry system is redesigned from Flight 2 and is now adjustable for different back lengths. The back panel padding has been expanded for better comfort and improved ventilation while being enhanced for hiking with even heavier packs. The front pocket has been updated and is now made of super-elastic Ultra Stretch.
The bag has a newly developed "No Sag" hip belt (NOTE! Sold separately, see here) with built-in reinforcement for increased stability.
The bag is sold in two different sizes, 22 inches for shorter users and 25 inches for taller/larger users.
Features
Weatherproof main guide with roller closure.
Large stretchy front pocket in mesh.
Frame in 7075 T6 aluminum.
Horizontal aluminum crossbar.
Attachment/opening for hydration system (hydration port).
Removable hip belt for lighter rides (sold separately).
Reinforced hip belt for increased comfort.
Recommended load: 16-23+ kg (35-50+ lbs).
How to measure back length to choose the right size
The back length is measured from the C7 vertebra (the 'protruding' vertebra at the base of the neck) down the spine to an imaginary line between the iliac crests.
A typical back length for a man who is about 183 cm tall might be 43-48 cm (17-19 inches).
For a woman who is about 165 cm tall, the back length can be around 38-41 cm (15-16 inches).
Note that this varies greatly depending on body shape.
Tips on hip belt sizing
Go by the size you usually wear in jeans.
Medium=29″ to 34″
Large=33″ to 38″
Choose a size larger if you often hike in winter with extra layers.
Choose a size smaller if you tend to lose weight during long summer trips.
Specifications for Flight 3 Backpack
Weight:
- 1.22 kg (2 lbs 11 oz / 43 oz)
Color:
Grey/black
Volume:
- Packing bag: 52 liters (3200 cubic inches)
- Front pocket: 9 liters (534 cubic inches)
- Side pockets for bottles: Holds one Nalgene bottle or two 1L Smart Water bottles.
Measurements:
- Circumference at the top: 104 cm (41 inches)
- Circumference at center: 99 cm (39 inches)
- Bottom circumference: 89 cm (35 inches)
- Unrolled height: 89 cm (35 inches)
Material
- Main materials:
- Ultra200X™:
- Laminate of pure UHMWPE (ultra-high molecular weight polyethylene) and recycled polyester
- Waterproof to over 200 PSI
- High abrasion resistance (4400 cycles in Taber test)
- Tear strength: 114.5 lb (wire direction) / 117.6 lb (weft)
- Ultra200X™:
- Pockets:
- UltraStretch™:
- Blend of Nylon 6-6, Lycra® and UltraPE
- 4-way stretch material
- Abrasion resistance of 20 000 cycles
- UltraStretch™:
Included with purchase:
- Backpack strap kit
Please note that lap belts are sold separately
Made in Colorado, USA



2 reviews of Seek Outside Flight 3
Pros:
Good bag with stable metal frame (ALU I think). Large mesh pocket that is great to have kitchen and rain gear + reinforcement garments in etc.
Good side pockets for bottles etc. Spacious. Large looped packing straps on the sides.
Con's:
- Too narrow shoulder straps. Tried to adjust them but they cut in if you carry 16-17kg or more.
- The chest strap disappeared on day 1. Too small a device - and damn annoying.
- Would have liked more fastening loops to use the supplied extra straps (+).
Have used the bag 2 days with about 10kg. Very good carrying comfort I think. The large outside pocket is super👍