UltrAspire Bronco Race Vest

• Minimalist 5 litre design: Combines useful ultra-running storage with a very low 159g pack weight.
• Accessible storage: Hydration, food and frequently used equipment can be reached without removing the vest.
• Four front stretch pockets: 4-way stretch mesh provides accessible hydration and equipment storage across the front harness.
• Large side pockets: Stretch saddlebag-style pockets provide substantial on-the-move storage with elastic closures to help stabilise their contents.
• 2x 500ml soft flask carry: Front hydration pockets accommodate two 500ml soft flasks. Soft flasks are not included.
• 1 litre reservoir compatible: Rear hydration storage accepts a reservoir up to 1 litre. Reservoir not included.
• Expandable rear compartment: 4-way stretch construction expands to accommodate additional kit but lies flat when lightly packed.
• Guided rear access: A raised foam guide helps your hand find the rear compartment opening when reaching behind you.
• MaxO2 closure: Single-pull shock-cord sternum system accommodates chest expansion while helping maintain a stable fit.
• UltrAcool Light Mesh: Lightweight breathable mesh forms the back panel and harness structure.
• Sweat-resistant security pocket: Rear zippered pocket provides secure storage for smaller items.
• Water-resistant construction: Silicone and PU-coated lightweight nylon helps resist water, abrasion and tearing.
• Sweat-proof webbing: Resists absorbing moisture and becoming heavier when wet.
• Soft edge binding: Microfibre polyester edging reduces abrasive contact against skin and clothing.
• Reinforced construction: Bar-tacked stress points and zig-zag stitching reinforce high-load and elastic areas.
• Reflective detailing: Front and rear details provide additional visibility in low light.

Measure around the chest while wearing the clothing you expect to use with the vest. The three size ranges overlap, allowing adjustment between sizes.

The MaxO2 closure provides additional adjustment across the chest using stretch cord rather than fixed sternum straps.

For information about UltrAspire running vests and hydration packs, see our UltrAspire pack guide.

If you are deciding how much carrying capacity you need, see our Running Backpacks, Race Vests & Hydration Packs Guide. Capacity should be considered alongside mandatory kit, aid-point spacing, water availability, weather, pace, access to crew and your preferred carrying strategy, rather than race distance alone.

If you are unsure about sizing, hydration setup or whether the Bronco provides the right capacity for your ultra-running kit, get in touch for straightforward advice.