UltrAspire Nucleus Race Vest - 5L
UltrAspire Nucleus Race Vest - 5L
UltrAspire Nucleus Race Vest - 5L
UltrAspire Nucleus Race Vest - 5L

UltrAspire Nucleus Race Vest - 5L

Regular price $139.00 Sale price$95.00 Save $44.00

While standing with your arms relaxed at your side, wrap a flexible tape or length of string around your chest at its widest point. The tape should go through your armpits and stay parallel with the floor while taking the measurement.

Ultraspire chest measurement guide
  • In stock, ready to ship
  • Free shipping on orders over $100

The Nucleus, just added to our vest lineup features our new Ergo X running Harness which keeps the weight and pressure points off of the soft tissue areas resulting in better blood flow and cooling.

The front pocket is double layered for added capacity. The back compartment is layered with sweat proof fabrics to keep contents safe from moisture and sweat. The packs total capacity is 5L.

This pack features the UltrAcool Light Mesh for added durability and breathability. The Nucleus utilises the Max02 Waist closure system which provides an incredible fit with easy adjustment, also allows for an uninterrupted natural breathing pattern.

The Nucleus vest includes our UltraFlask 550 Hybrid Bottle.

One size fits most. (chest size 66cm - 121cm)

As at 1st February 2023: We are currently expecting minimal order processing delays of one to two additional days due to out of the ordinary weather events around the country. While most orders are being delivered on time and quickly there are still the odd few that take a bit longer.

Orders for the moment, are being processed and shipped within one to four working days of being received. Our expected order delivery schedule is...

  • NSW   2-5 business days from ordering
  • VIC     3-6 business days from ordering
  • QLD   3-6 business days from ordering
  • SA      4-7 business days from ordering
  • WA     5-9 business days from ordering
  • NT     7-12 business days from ordering
  • NZ    12-18 business days from ordering

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.



Lumen 600 V3

This light is lightweight, comfortable and bright!, I used this in a 12 hour night race and could keep the brightness as high as I wanted (because the batteries are cheap and easy to change). It lit the trail well and allowed me to run at my pace (did not need to slow down for visibility).

Mike Hefti

Zygos V4.0

This vest is AMAZING!! I’ve had many vests over the years but this one beats them all, hands down. I love the placement of pockets, materials used and the overall thought of design that will be long lasting and comfortable at the same time.

Matt Ozanic

Nucleus Vest

Love the design with easy front bottle and phone access. I am short with short arms and love that it’s just an easy grab upfront and super easy to put back in place. Love the magnetic pickers for key fob and nutrition. Such an innovative design and UltrAspire nailed it.


Recently viewed