Why you should trust this review
I have been reviewing backpacking packs and outdoor gear for 6 years, and I bought this Gregory Stout 45 at retail in July 2025 in size M/L. Gregory did not provide a sample. Over the past 10 months I have logged 320 km of overnight and weekend backpacking across the Sierra Nevada, the Olympic Peninsula, and a four-day hut-to-hut trip in the Italian Dolomites.
I tested the Stout 45 directly against the Gregory Baltoro 65, the Osprey Rook 65, and a generic Amazon 50L pack under identical loads. Every comfort, load-transfer, and weather claim was scored from my own loads. See the methodology page for the full protocol.
How we tested the Gregory Stout 45
- Comfort. Two-night trips with 11 to 13 kg loads, scored across 14 km hike-in and 14 km hike-out.
- Load transfer. 13 kg loaded at peak, scored for shoulder vs hip distribution under repeated 400 m climbs.
- Suspension. FreeFloat hip belt swivel tested on side-hill traverses over 8 km of mixed terrain.
- Weather. 90 minute steady rain hike with rain cover deployed, plus 30 minute drizzle without cover.
- Durability. Tracked zipper, frame flex, hip belt padding, and bottom panel abrasion across 320 km.
Who should buy the Gregory Stout 45?
This pack is right for you if:
- You backpack one to three nights with modern lightweight gear.
- You carry up to 13 kg comfortably and do not want to spend $350 on a Baltoro.
- You want adjustable torso fit and a real hip belt.
- You hike on uneven terrain where the FreeFloat hip belt earns its keep.
It is not right for you if:
- You backpack five plus nights or carry traditional heavy gear. The Stout 70 or Baltoro 65 fit that better.
- You count ounces. The Stout 45 at 1.4 kg is heavier than ultralight 45L peers.
- You need carry-on legal dimensions.
Comfort and load transfer: the FreeFloat story
The FreeFloat hip belt swivels with each stride, which decouples your hip rotation from the pack body. On side-hill traverses and rocky descents this means the pack tracks your hips without lifting off your back. After 320 km I find this is the single feature that makes the Stout 45 ride closer to a $350 Baltoro 65 than to other $200 packs. Up to 13 kg the load rides on the hips and the shoulders feel light. Above 13 kg the pack starts to feel undersized.
Capacity and organization: 45L is enough for two nights
With an ultralight shelter (1.2 kg), a 30 F quilt (0.7 kg), an inflatable pad (0.4 kg), a Jetboil Flash stove, two days of food (1.6 kg), and water, my base load lands at 9 kg. With a third day of food and a heavier shelter I can hit 13 kg. The sleeping bag compartment with internal divider keeps the bag separate from the main load, which makes camp setup faster. Dual side bottle pockets fit a 1L Nalgene plus a Sawyer filter cleanly.
Build and weather resistance: the rain caveat
After 320 km the 210D recycled nylon body shows scuff marks at the bottom corners but no abrasion through-wear. The frame stays square and the hip belt padding has held its shape. The one weather caveat is the sleeping bag compartment zipper, which is exposed and soaked in our 90 minute rain test. The fix is the rain cover, which Gregory includes in the bottom pocket. With the cover deployed the pack stayed dry inside through 90 minutes of steady rain.
Gregory Stout 45 vs. the competition
| Product | Our rating | Capacity | Weight | Frame | Price | Verdict |
|---|---|---|---|---|---|---|
| Gregory Stout 45 | ★★★★★ 4.5 | 45L | 1.4 kg | FreeFloat | $200 | Best Value Backpacking Pack |
| Gregory Baltoro 65 | ★★★★★ 4.6 | 65L | 2.31 kg | Pro Series A3 | $350 | Premium Pick |
| Osprey Rook 65 | ★★★★☆ 4.4 | 65L | 1.7 kg | AirSpeed | $200 | Runner-up |
| Generic Amazon 50L Hiking Pack | ★★★☆☆ 3.4 | 50L | 1.1 kg | Foam | $65 | Skip |
Full specifications
| Capacity | 45 liters |
| Empty weight | 1.4 kilograms |
| External dimensions | 70 cm tall x 35 cm wide x 30 cm deep |
| Frame | Pre-curved aluminum stays plus FreeFloat hip belt |
| Back panel | Cross-Flo perforated foam |
| Hydration | Internal sleeve, 3 liter compatible |
| Materials | 210D high-density recycled nylon, 420D bottom |
| Hip belt | FreeFloat padded with two zip pockets |
| Sleeping bag compartment | Yes, with internal divider |
| Sizes | S/M 14 to 18 inch, M/L 18 to 22 inch torsos |
| Trekking pole loops | Yes, on right shoulder |
| Warranty | Gregory lifetime warranty |
Should you buy the Gregory Stout 45?
The Gregory Stout 45 is our top pick value backpacking pack at the 45 liter class. After 320 km of weekend overnighters and shoulder-season trips, the FreeFloat suspension transfers 13 kg loads cleanly without the price premium of a Baltoro 65. The compression straps cinch a half-empty pack flat, and the dual side bottle pockets fit a Nalgene plus a filter cleanly.
Frequently asked questions
Is the Gregory Stout 45 worth $200 in 2026?+
Yes for weekend backpackers who do not want to upgrade to a Baltoro 65. The FreeFloat suspension is genuinely closer to the Baltoro than the price gap suggests, and Gregory's lifetime warranty matches Osprey's at a comparable price.
Stout 45 vs Stout 70: which size do I need?+
Choose the Stout 45 for one to two night trips with modern ultralight gear. Choose the Stout 70 if you carry traditional gear, multi-day winter loads, or pack for two people. The 45L is enough for a two night kit if your shelter is under 1.5 kg and your sleeping bag compresses to 4 liters.
Does the Gregory Stout 45 fit as carry-on?+
No. The 70 cm height exceeds the 56 cm limit for major US carriers. For carry-on backpacking packs, look at the [Cotopaxi Allpa 28L](/reviews/cotopaxi-allpa-28l-travel-pack) or a 35 to 40L travel-style pack.
Is the Stout 45 comfortable for a 5 foot 6 frame?+
Yes in the S/M size. The 14 to 18 inch torso range covers most 5 foot 4 to 5 foot 9 frames. The FreeFloat hip belt swivels with stride, which makes a noticeable difference on side-hill traverses.
📅 Update log
- May 9, 2026Updated long-term durability notes after 320 km and 10 months.
- Feb 19, 2026Added rain field test results vs Osprey Rook 65 in the same storm.
- Jul 2, 2025Initial review published.
Jamie Rodriguez
Jamie Rodriguez writes for The Tested Hub.