Osprey Dyna 1.5 Womens Running Vest Pack vs UltrAspire Alpha 4.0 Vest

The main difference between the Osprey Dyna 1.5 Womens Running Vest Pack and the UltrAspire Alpha 4.0 Vest is that the Dyna 1.5 Womens Running Vest Pack has Sternum / Chest Straps (Removable dual chest straps) while the Alpha 4.0 Vest does not.

Osprey Dyna 1.5 Womens Running Vest Pack
Ultraspire Alpha 4.0 Vest FRont View
Specs Brand Osprey UltrAspire
Name Dyna 1.5 Womens Running Vest Pack Alpha 4.0 Vest
Category Sports Sports
Sub Category Running Running
Capacity (L) 1.5L 6L
Dimensions (in) 15 x 8.7 x 2.4 31-36
Weight (lb) 0.6 0.6
Fabric 70D x 140D Nylon Triangle Ripstop Double layered 30D Fabric
Color 2 colors and patterns Emerald Blue Lime
Warranty Osprey Lifetime Warranty UltrAspire Warranty/Return Policy
Release Date November 16, 2018 July 5, 2019
Rating 4.7 4.5
Price Under $100 Under $125
General Features Shoulder Straps Women specific body fit mesh shoulder straps Angled and curved shoulder straps
Sternum / Chest Straps Removable dual chest straps
Zippers Large zipper pulls
Main Compartment Access Top zipped access Normal zipped access
External Pockets 1 zipped front pocket, 2 vertical zipped pocket, and 4 stretch mesh pockets Rapid access pockets, passage pocket and drawstring pocket
Internal Compartments Internal reservoir sleeve
Water Bottle Yes
Handles Top grab handle
Loops and Attachments Tuckaway safety whistle
Travel Features Compression Straps External compression straps
Hiking / Backpacking Features Ergonomic ErgoFit
Ventilated Back Ultracool system
Trekking Pole Holders Trekking pole attachment Trekking pole attachments
Hydration Features Bladder Size Includes Osprey Hydraulics® 1.5 LT reservoir with QuickConnect and sternum strap magnet for bite valve Holds 2L reservoir
Hydration Compatible Yes Yes

You're currently comparing the Dyna 1.5 Womens Running Vest Pack by Osprey against the Alpha 4.0 Vest by UltrAspire .


Osprey 's Dyna 1.5 Womens Running Vest Pack is a Sports backpack with Running features while UltrAspire 's Alpha 4.0 Vest is a Sports backpack with Running features.

The Osprey Dyna 1.5 Womens Running Vest Pack has a capacity of 1.5L (liters), weighs 0.6 pounds and it's dimensions in inches are 15 x 8.7 x 2.4. It's made of 70D x 140D Nylon Triangle Ripstop and is available in 2 colors and patterns in comparison the UltrAspire Alpha 4.0 Vest's capacity is 6L with a size of 31-36 inches. Constructed from Double layered 30D Fabric it weighs 0.6 pounds and is available in Emerald Blue Lime.