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Osprey Levity 45 Litre Ultralight Backpack


Sale price $329.95 Regular price $349.95

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The Osprey Levity 45 Litre Ultralight Backpack is the most comfortable and ventilated pack ever made for the lightest loads imaginable. It's perfect for streamlined weekends or committing thruhikes. It's for people who pack lighter, go further, and think smarter. This pack isn't on Instagram, because phones are too heavy, and views look better in your mind anyway. But if you are one of those maniacal gram-counters, look no further. Backed by Osprey's All Mighty Guarantee, forever. The Osprey Levity/Lumina Series is made for backpackers who celebrate base pack weights.  Osprey kicked off this project by asking, "Can we do this better?"  It was never about achieving a number on a scale but instead finding a solution the is not only light but effectively carries the loads tasked with it. Osprey combined lightweight materials with durable outer fabrics to minimize pack weight without sacrificing durability.  No pack of this weight comes close in comfort, ventilation or load-carrying ability. Pick it up, put it on, and head out on steamlined weekends or the most committing thruhikes.


  1. Fixed top lid with zippered pocket for organizing smaller items
  2. Bellowed front fabric pocket stores rain gear for easy access when skies darken, or wet gear after the downpour stops
  3. Dual access fabric side pockets for water bottles or smaller items with removable InsideOut™ compression cord
  4. Internal main compartment compression strap
  5. Top lid cord loop attachment points for external gear attachment
  6. Sternum strap with integrated safety whistle

Key Attributes

Super Ultralight, Super Comfortable
Gone are the days where carrying the lightest loads conceivable meant enduring the worst experience imaginable. The Levity/Lumina carry the right loads for the job with comfort never dreamt of until now.

Overnight and Thru Hikes
Superultralight isn’t only for thruhikes, and everyone from driven youthful athletes to reminiscing boomers will appreciate what carrying less can do for their experience, no matter the duration.

Reliably Durable
By integrating complimentary high-performing fabrics we ensure this series’ scant weight is matched with incredible durability for adventures that last weeks, months or more.

A Yarn to Tell
Osprey's NanoFly™ fabric integrates ultra-high-molecular-weight polyethylene (UHMWPE) ripstop and Cordura Nylon, creating an incredibly light fabric with remarkable abrasion resistance.

Carry Information


  • 3.5mm Lightwire

Exoform Harness

  • Seamless layered mesh provides improved comfort and cushioning
  • 15 mm adjustable slide sternum strap

Superultralight Airspeed Backpanel

  • 6065 aluminum frame
  • 3D-tensioned breathable mesh backpanel with side ventilation

Exoform Hipbelt

  • ErgoPull™ closure
  • Seamless layered mesh provides improved comfort and cushioning


Load Range™
2-9 kgs

Volumes and Weights

US and International weight and volume specifications

Size cu. in. liter lbs/oz kg.


42 1.786 .81
M 2746 45 1.852 .84
L 2929 48 1.927 .87


Size Height Width Depth
Small (cm) 63cm 40cm 30cm
Small (inches) 24.8 IN 15.75IN 11.81IN
Medium (cm) 68cm 40cm 30cm
Medium (inches) 26.77IN 15.75IN 11.81IN
Large (cm) 73cm 40cm 30cm
Large (inches 28.74 IN 15.75 IN 11.81N
Key Fabrics used:
  • Main:30D Cordura® Silnylon Ripstop
  • NanoFly™ 210D Nylon X 200D UHMWPE
  • NanoFly™ 210D Nylon X 200D UHMWPE

Sizing and Fitting of your Osprey Pack

Fit is the key to pack performance. Take the time to get it right. Most Osprey packs are available in multiple sizes to fit a range of torso lengths. To find your torso length, have a friend measure your back along the spine (as shown in the picture below) from the level of your iliac crest (the top of your hipbones) to your C7 (the knobby bone at the base of your neck).
Use the table below to determine your pack size.
Levity 45 Litre Backpack Small Medium Large
Back Length 16-19"/40.5-48cm 18-21"/46-53cm 21-23"/53-58.5cm