Brand: UltrAspire
Category: Running Vests & Packs
Recommended by Isabella Poulos, Trail and mountain running — Telluride, CO
Highlights: lightweight
The Mountain Racer Waist Pack is a robust and spacious accessory designed for outdoor enthusiasts who demand reliability and organization in challenging environments. With its premium construction and thoughtful features, it ensures your essentials are securely stored and easily accessible during your adventures. 1. High-durability materials ensure long-lasting performance in rugged conditions. 2. 3-liter capacity provides ample space for essentials, making it perfect for extended outings. 3. Large kangaroo-style front pocket with an internal phone sleeve for quick access to your devices. 4. Two side pockets equipped with compression straps and cord locks for secure storage of sensitive gear. 5. Includes an 800 mL softflask with a locking cap, designed for easy hydration on the go. 6. Light bracket compatibility allows for convenient attachment of a waist light for nighttime visibility. 7. Available in four sizes (Small to Extra Large) for a customizable and secure fit. The Mountain Racer Waist Pack is ideal for trail running, hiking, and other outdoor activities where mobility and organization are crucial. It excels in demanding terrains and varying weather conditions, making it suitable for both novice and experienced adventurers. Whether you're navigating mountain trails or participating in endurance events, this waist pack provides the functionality and comfort needed for optimal performance.
Price: $124.95
Isabella Poulos's review
I love this belt. I've been wearing it since the beginning of 2026, raced twice in it already, and wear it for almost every training run. Zero bounce, fits an 800ml bottle, and plenty of pockets for snacks, your phone, etc. Plus you can attach their light to the front!
Recommended by Isabella Poulos, Trail and mountain running
Frequently asked questions
What does Isabella Poulos say about the Mountain Racer Waist Pack?
I love this belt. I've been wearing it since the beginning of 2026, raced twice in it already, and wear it for almost every training run. Zero bounce, fits an 800ml bottle, and plenty of pockets for snacks, your phone, etc. Plus you can attach their light to the front!
Why does Isabella Poulos recommend UltrAspire?
Isabella Poulos recommends the UltrAspire Mountain Racer Waist Pack for running vests & packs. I love this belt. I've been wearing it since the beginning of 2026, raced twice in it already, and wear it for almost every training run. Zero bounce, fits an 800ml bottle, and plenty of pockets for snacks, your phone, etc. Plus you can attach their light to the front!
Is the Mountain Racer Waist Pack a good running vests & pack?
Yes — Isabella Poulos recommends the Mountain Racer Waist Pack by UltrAspire as their running vests & packs pick. I love this belt. I've been wearing it since the beginning of 2026, raced twice in it already, and wear it for almost every training run. Zero bounce, fits an 800ml bottle, and plenty of pockets for snacks, your phone, etc. Plus you can attach their light to the front!
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What other hosts are saying
4 experts recommend the UltrAspire Mountain Racer Waist Pack.
Keifer Gilbert, Endurance Enthusiast, Adventurer, Coach, Father, Sober Dude
Without a doubt the most underrated waist belt on the market. Second to none in terms of storage capacity, materials used and overall fit. Absolutely no bounce in this thing and it can store both a 1L and 800ml flask. I'm a heavy sweater so this thing has been a game changer for me. It also is compatible with UltraSpire's waistlight system, which simplifies race day logistics in many ways.
Recommended in 10 Products I Actually Use
Miles Victors, Outdoor Enthusiast and Mountain Athlete
Every run, every ultra, every time. Hydration, lighting, storage, emergency gear, etc. Can't go wrong with this one, probably my number 1 recommendation.
Recommended in 10 Products I Actually Use
Amazing “no bounce” belt. I’ve gone through countless belts, this is the one I’ve settled with. Amazing in all ways, construction, performance, capacity. It’ll blow you away.
Recommended in 10 Products I Actually Use
