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Osprey Packs Ultralight Backpack Liners

$34.95 - $44.95


Ultralight Backpack Liners

When you're spending multiple days in the mountains, there's a solid chance you're going to encounter some wet weather at some point. When the rain finally strikes, protect your gear with Osprey Packs Ultralight Pack Liners. These waterproof, ultralight, and ultra-packable liners fit seamlessly into your pack to keep your gear dry, and they pack up super small for easy storage when skies are clear.

  • Seamlessly fits in your pack to protect your gear
  • Waterproof roll-top closure and fully taped seams
  • Rectangular shape for efficient packing
  • Item #OSP009C

40D nylon ripstop
Pack Size
[small] 30 - 50L (1831 - 3051cu in), [medium] 50 - 70L (3051 - 4272cu in), [large] 70 - 100L (4272 - 6102cu in)
Claimed Weight
[small] 3oz, [medium] 3.8oz, [large] 5.1oz
Recommended Use
hiking, backpacking
Manufacturer Warranty

Tech Specs

What do you think about this product?


>Rating: 5

Better than a Pack Cover

I've used it several times
True to size
Size Bought
5` 2"

First off, I should probably start by saying how much I love Osprey. I'm a bit biased, but what can I say? They deliver. I've gone through a couple of their pack covers, and they always end up with huge rips/tears from walking under tress/putting my pack down on a sharp rock, etc. Not Osprey's fault, but I needed something that would be protective from the elements always. Enter: the Ultralight Liner. Works exactly as intended. No issues yet after a couple uses. While Electric Lime isn't really my favorite color, I enjoy having it in my pack because it shows off the darker colors of my stuff inside my pack- the electric lime makes other items easier to see and find. Two thumbs way up for me.

>Rating: 5

Ultralight protection

I've used it once or twice and have initial impressions

Depending on the size, this thing is between 3 and 5.1 ounces. It lets you ditch stuff sacks (most of which aren't waterproof anyway) to save weight and is much more effective that a pack rain cover, which invariably lets water drip down your back. This is the best way to keep your stuff dry hands down. Here's a pic of it in action:


Great demonstration! Thanks Matt! Looks cold!! Leta Osprey Rep

>Rating: 5

Works Great

I've put it through the wringer

The pack liner is a necessity for all Non water-proof packs. It works great and is super light. Only problem that I had with it is I paired it with the Osprey Levity which has a Aluminum cross bar that shredded it after two months on trail . I wouldn't say that's the liners fault rather the packs design. It still remains mostly water-proof even after it was " attacked " by the levity. Love the liner as it got rid of three stuff sacks and saved my a couple ounces.

Thank you for the review, Spencer! Leta Osprey Rep

>Rating: 5

Large dry bag

I've used it several times

This is a great dry bag that is large enough to fit in a 75 liter black diamond pack. Sometimes heading into wet or snowy weather can ruin all of your gear when you open your pack. This problem, however, is now solved.

Many thanks, Lisa! Leta Osprey Rep

>Rating: 4

Stay Dry

When your gear absolutely can't get wet, this is a solid option. I've used it in the snow and a quick downpour and it performed admirably. Fits great in every pack I've tried it in as well, though I find it easiest to pack the liner out side of the bag then really shove it in the pack. Not the intended use, but I also like ti use the liner to keep my climbing gym bag from getting overly chalky/dirty.


Thank you Ben! Leta Osprey Rep

>Rating: 5

AMAZING pack liner

I used one of these on my trip to Costa Rica and it was absolutely a necessity. They kept things dry and separate in my suit case and also kept my clothes and electronics dry in my pack when hiking, river rafting, and spending a day at the beach. Plus they are easy to open and easy to secure! I highly recommend, 10/10 would buy again.

Thank you so much for the review, Kezia! Enjoy! Leta Osprey Rep

>Rating: 5


I've put it through the wringer

So this pack liner is really awesome. I have used them in several different packs. a few things to note They are really lightweight, durable, and are fairly airtight. Yes, yes, 'technically' they are not waterproof. But yeah... they are. I have dumped them under water a few times while in some canyons in southern Utah, trudged through some snow and sleet during an elk hunt, and turned them into a pillow when I forgot mine on a 30-mile hike around the Tetons. I have a medium for my 50L and a large for my 70L pack. They work great as a liner and keeps the pack clean.

Thank you Travis! Leta Osprey Rep

>Rating: 5


I've used it several times

Took this in my pack to Costa Rica last month, it's a must have! Not only was it great to put your suit/ rash guard/ towel in after saturating expeditions like white water rafting or swimming in waterfalls, but just having it in general to separate your dirty/clean clothes on the trip was super handy. It is definitely fully waterproof, and super light weight. I had wet clothes in there for the better part of a day, and it didn't seep through into my dry gear at all. The extra weight is negligible, and is well worth the convenience and comfort it will provide. For reference, I had the small size, and it was more than enough for all my stuff in my 60L pack.

Love it - Thank you Andrew! Leta Osprey Rep

>Rating: 5

Bomb Proof!

I've put it through the wringer

I was a bit apprehensive regarding the actual waterproofing ability with this liner. However, It performed in an absolute flawless manner. I used this liner during my tip to the Subway in Zion. Place your gear into the sack, roll the top no less than three times, and you're ready to go.

EXCELLENT! Thank you for the review, Wes! Leta Osprey Rep


What are the actual measured dimensions of the small and medium size pack liners?