Osprey Ultralight Collapsible Stuff Pack
- Storage Volume: 0.6 cu ft
- Size: O/S
- Item Weight: 0.33 pounds
- Strap Type: Adjustable
Last refreshed Sep 9, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A near-weightless spare bag worth keeping folded in your luggage for the day you need extra capacity and did not want to check a second bag to get it.
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ASIN: B0BKQKCMWGModel: 10004894Category: Hiking Daypacks
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Overview
The Osprey Ultralight Collapsible Stuff Pack is a 0.329 lb packable day pack that folds down small enough to carry empty and unfolds into a full daypack for souvenirs, gear or an extra outing bag. Built for travelers and hikers who want backup capacity without backup weight.
This is an accessory pack, not a primary bag: its job is to sit collapsed inside a suitcase or main pack until you need a second bag for a day trip or the extra volume gathered on a return journey. Osprey builds it from bluesign-approved, GRS-certified recycled 40D nylon, which is a supply chain and materials detail rather than a performance claim, but it does mean the fabric is held to a documented recycled content standard.
- Weighs 0.329 lbs, folds fully collapsible
- 7.48H x 8.66W x 16.54D inches when expanded
- GRS-certified 100% recycled 40D nylon
- Sternum strap with built-in emergency whistle
Who it's for
Good for travelers and hikers who already carry a main bag and want a lightweight spare for day trips, market runs or gear overflow. Not meant to replace a structured daypack for daily carry, since it has no frame and limited organization.
Pros and cons
- Weighs about 0.329 lbs and folds into its own pocket
- Padded mesh straps for comfort despite the ultralight build
- Sternum strap includes an emergency whistle
- Made from GRS-certified recycled nylon
- No internal frame or back panel structure
- Limited organization beyond two side pockets and a key clip
Performance notes
The padded mesh shoulder straps and adjustable sternum strap (with an emergency whistle built in) give it more comfort than most stuff sacks despite the ultralight build, and the dual stretch side pockets plus internal key clip add basic organization without adding meaningful weight. At 0.329 lbs it is light enough to carry indefinitely without noticing it in your main luggage.
Specifications
| Brand | Osprey |
|---|---|
| Model | 10004894 |
| Dimensions & fit | |
| Size | O/S |
| Item Weight | 0.33 pounds |
| Backpack Harness Size | Medium |
| Apparel Fabric Weight Class | Lightweight |
| Fit to Size Sentiment | Positive |
| Shoulder to Bottom Hem Length | 7.5 inches |
| Item Dimensions D x W x H | 2 × 6 × 5 inches |
| Compatible Device Size Maximum | 16.54 inches |
| Capacity & performance | |
| Storage Volume | 0.6 cu ft |
| Age Range Description | Adult |
| Construction & materials | |
| Outer Material | Nylon |
| Material Type | Nylon |
| Apparel Fabric Stretch | No Stretch |
| Color | Waterfront Blue |
| Shell Type | Soft Shell |
| Included components | |
| Backpack Design | Daypack Backpack |
| Backpack Harness Type | Shoulder Harness |
| Unit Count | 1 |
| Other details | |
| Strap Type | Adjustable |
| Water Resistance Level | Not Water Resistant |
| Fit Type | regular |
| Number of Compartments | 1 |
| Number Of Pockets | 4 |
| Apparel Closure Type | Zipper |
| Zippered Compartment Count | 2 |
| Lining Description | Nylon |
| Item Shape | Rectangular |
| School Type | Elementary School |
| Sport Type | Travelling |
| Number of Items | 1 |
| Import Designation | Imported |
| Pattern | Logo |
| Product Style | Ultralight Stuff Pack |
| Product Care Instructions | Hand Wash Only |
| Recommended Uses For Product | School, Travel, Work |
| Style Number | 10004894 |
| Subject Character | Sports |
| Other Special Features of the Product | Water Resistant |
| Theme | Outdoor Adventure |
| Item Type Name | Travel |
Closest rivals on specs
G4Free TN0124 Packable Hiking Backpack 20L- Item Weight 0.33 vs 0.38 pounds (-13%)
- Storage Volume 0.6 vs 0.7 cu ft (-14%)
EVANCARY Mini Sling Backpack Crossbody Bag- Item Weight 0.33 vs 0.44 pounds (-25%)
- Storage Volume 0.6 vs 0.5 cu ft (+20%)
- Shoulder to Bottom Hem Length 7.5 vs 11 inches (-32%)
4Monster Water Resistant Packable Hiking Daypack- Item Weight 0.33 vs 0.13 pounds (+154%)
Frequently asked questions
How small does the Osprey Ultralight Stuff Pack fold down?
It collapses into its own internal pocket; Osprey does not list a packed dimension, but at 0.329 lbs it is designed to take up minimal space in luggage.
Is the Osprey Ultralight Stuff Pack padded for comfort?
Yes, it has breathable padded mesh shoulder straps and an adjustable sternum strap, despite its ultralight construction.
What is this pack made from?
bluesign approved, GRS-certified 100% recycled 40D high-tenacity nylon.