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The Spry 4.0 is  a minimalist pack that can be utilized in a variety of settings. The improvements on the award winning Spry series improve functionality, comfort, and durability. For capacity, the front harness pockets have been updated to accommodate a variety of hydration or gear comfortably and securely. The back panel has a sweat-proof liner under polyester mesh to keep the contents in the main compartment dry but still breathable during longer adventures. A sweat-proof zippered pocket alongside the main compartment allows for storage of items you want secure and dry. The main compartment is a 4-way stretch mesh designed to expand or compress to the load and is built to carry a 1 liter reservoir. The magnetic closure on the main compartment keeps the contents secure and provides quick accessibility. The back panel also features a shock cord to carry additional clothing if needed. The UltrAcool Light Mesh on the shoulder and harness of the Spry 4.0 make the pack very durable and incredibly lightweight. One size fits most.


Recommended Use:

Flexible for light and fast ultra races with frequent refueling stops; half marathon to marathon for runners who prefer to carry their own supplies; compatible with optional bottles and reservoirs.



Silicone, DWR, PU coated fabrics for water resistance.

Lightweight, soft, breathable, but strong mesh pulls moisture away from the body to keep skin dry and cool.

Plush feeling micro-fiber polyester edges, soft and non-abrasive against skin and clothing.

Sweat proof webbing—won’t absorb water or get saturated and heavy.

Safety stitched bar tack on all stress points.

Quiet, bounce free, easy to see and use, zipper pulls.

Zig zagged stitching over elastic for ultra-durability, increased stretch and rebound.

Simple, fast, easy in and out bladder attachment.

Magnon pocket for sweat-free pills. With automatic magnetic closure for rapid access to pills and other essentials. Patent Pending.

Max 02 sternum ™ for unrestricted breathing while maintaining a stable pack. Uses shock cord with good stretch for unrestricted breathing but also good rebound on the stretch for a stable ride.


Patent Pending.

Fit:  Unisex

Size:  Universal (Chest Size:  26″-48″)

Color options:  Blue/Sky

Hydration Compatible (not included):  2x UltraFlask 550

Reservoir Compatible (not included):  1L Bladder

Capacity: 214 c.i. (3.5 L)

Weight: 7.5 (213 g)

Dimensions: 16″ x 1″ x 15″

UltrAspire Spry 4.0 Vest

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