Osprey
Ultralight Pack Liner Medium
Best waterproof organizer for backpackers needing to keep gear dry.
Keep your gear dry and organized with the Osprey Ultralight Pack Liner. This medium-sized liner features a roll-top closure and waterproof coated fabric and seams, ensuring your essentials are protected from the elements. Its rectangular shape is designed for efficient packing within your backpack. Constructed from bluesign® approved 100% recycled 40D high-tenacity nylon, it's a sustainable choice for your adventures. Ideal for backpacking, this liner offers reliable protection and smart organization for your gear.
$47.50
Owner Satisfaction
4.6
/ 5
Category Rank
338
/ 1600
#338 in Packing Organizers
Price vs Category Average
+0%
Below average
Volume
353958
/ in³ / L
Who it's for
- Outdoor adventurers needing gear that resists tears and abrasions
- Backpackers trekking through unpredictable wet weather
- Ultralight hikers counting every gram in their kit
Who should skip it
- Hikers who prioritize quick, frequent access to their gear
- Backpackers using non-standard or differently sized packs
- Budget-conscious hikers seeking affordable waterproofing alternatives
Performance breakdown
Weatherproofing
Roll-top closure and taped seams provide a reliable barrier against moisture.
Weight Efficiency
Ultra-thin 40D nylon keeps your base weight impressively low.
Packing Geometry
Rectangular shape maximizes internal volume for efficient, boxy gear storage.
Material Durability
High-tenacity nylon balances lightweight performance with necessary trail-ready resilience.
Sustainability
Recycled materials and PFAS-free treatment set a high industry standard.
Ease of Access
Simple roll-top design allows for quick, intuitive gear retrieval.
Key Specs
Volume
3539 in³ / 58 L
Dimensions
24.02H x 14.57W x 12.2D in. / 61H x 37W x 31D cm
Main Fabric
bluesign® approved 100% recycled 40D high-tenacity nylon
Closure Type
Roll-top
Waterproof
Yes
Water Resistant
Yes
Material
Nylon
Features
- Keeps gear organized and protected
- Lightweight design
- Durable construction
- Ideal for travel and hiking
- Helps compress contents for efficient packing
- Waterproof coated fabric and taped seams
- Roll-top closure for secure sealing
- bluesign® approved 100% recycled materials
- PFAS-free DWR treatment
What customers say
Customers consistently praise the Osprey Ultralight Pack Liner Medium for its exceptional reliability in keeping gear dry, even in challenging weather conditions. Its high quality construction and durable materials instill confidence, making it a trusted choice for adventurers. Users appreciate its lightweight design and how effectively it protects essentials without adding bulk. This liner is widely regarded as an indispensable item for maintaining dry contents on any trip.
Know before you buy
The Ultralight Pack Liner is designed for full protection. It features waterproof coated fabric and taped seams, which, when combined with the roll-top closure, effectively keep your gear dry in wet conditions.
This medium liner has a volume of 58 liters and measures approximately 24 x 14.5 x 12 inches. It is designed to fit most standard backpacking packs, but we recommend measuring your pack's main compartment to ensure a good fit.
Not at all. The roll-top is made from lightweight 40D nylon, so it remains flexible and low-profile. It allows you to compress the liner to the exact size of your contents, which actually helps save space inside your pack.
Yes, it is constructed from 40D high-tenacity nylon. While it is ultralight, the high-tenacity weave provides excellent durability for standard backpacking and travel use, though it should be kept away from sharp, jagged objects.
Yes, the liner is a sustainable choice. It is made from 100% recycled nylon that is bluesign® approved and features a PFAS-free DWR treatment, ensuring it meets high environmental and safety standards.
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