Ultraspire Spry 4.0 Lightweight Running Race Vest - 1L Reservoir, Universal Size, Blue Sky

Meet Spry 4.0: A minimalist, high-performance running vest

Ultraspire’s Spry 4.0 is built for runners who value lightness, quick access, and flexible storage. The 4.0 updates emphasize comfort, durability, and a focus on what you need most when you’re moving fast—hydration, fueling, and weather-ready layers.

On the front, updated harness pockets provide secure, easy-access space for hydration gear and small items. A back panel with a sweat-proof liner helps keep the contents dry when the pace picks up, and a sweat-proof zippered pocket guards valuables you want to stay dry. The main compartment uses a 4-way stretch mesh that expands or compresses with your load, designed to carry a 1-liter reservoir for on-the-go hydration. An automatic magnetic closure keeps essentials secure yet accessible, while a back-panel shock cord offers a simple way to stash an extra layer. Weighing about 7.5 oz (213 g) and featuring UltrAcool Light Mesh on the shoulders, Spry 4.0 stays breathable and lightweight without sacrificing durability.

Why this vest fits fast, dynamic runs

Designed for a broad range of adventures, Spry 4.0 blends form and function to support a steady rhythm. The universal one-size-fits-most design prioritizes comfort without bulk, and the total volume of 214 cubic inches (3.5 L) provides room for essentials without slowing you down. The vest is informed by ErgoFit, MaxO2 System, and UltrAcool System technologies to support stability and airflow on demanding sessions.

• Hydration and gear organization: 1 L reservoir compatibility, front pockets for quick access, and a secure sweat-proof pocket.
• Security and accessibility: Magnetic closure for fast access to items, with a snug, stable carry.
• Breathability and weight: UltrAcool Light Mesh reduces bulk while maintaining durability on the shoulders and harness.

With its compact footprint and smart layout, Spry 4.0 is well-suited for long runs, training days, or fast day trips where every ounce matters. It promotes a natural rhythm and easy venting while you stay focused on pace and terrain rather than gear management.

• One-size fit supports versatile use across different body types, keeping a low profile under layers.
• Durable, dry-access design with a sweat-proof liner and a zip pocket for valuables.

Note: Individual fit can vary by torso length and equipment load. Start with a light pack and adjust as you go to find a comfortable balance between stability and accessibility.