Source 3L Hydration Bladder WLPS Low Profile – 100oz Pack‑Friendly Shape, High‑Flow Storm Valve

Source WLPS Low Profile is a 3‑liter hydration bladder built for fast drinking and pack-friendly fit, featuring Source's high-flow Storm valve and streamlined low-profile shape.

This 100 oz (3 L) bladder is crafted to sit close to your back for a lower center of gravity and quicker access to water on rides, runs, hikes, or long travel days. It brings together Source’s hydration know-how—fast dispensing, easy filling and cleaning, and a shape engineered to fit modern backpacks and vests—without extra bulk or complicated assembly.

How does the WLPS Low Profile make drinking faster and simpler?

The bladder uses Source’s high-flow Storm valve which delivers quick, unobstructed water flow when you bite, and seals securely when released to reduce spills. The valve design minimizes fiddly parts so you can hydrate on the move with minimal effort.

• Storm valve provides high flow with a self-sealing cap for leak resistance
• Ergonomic bite activation for one-handed drinking
• Low resistance tubing maintains steady flow over long sips

Will it fit comfortably in my pack or vest?

The WLPS low-profile silhouette is shaped to contour to your back, keeping the bladder snug and balanced inside slim hydration sleeves and race vests. Its flatter design helps reduce pressure points and improves pack stability on technical trails.

• 3 L capacity for extended outings without extra bulk
• Low-profile form factor designed for narrow hydration compartments
• Flexible material molds to pack interior for even weight distribution

Is the bladder easy to fill, clean, and maintain?

The wide opening and simple construction make filling and rinsing straightforward; you won’t need special tools to keep it clean. Materials resist odors and stains, and the minimal-seam design reduces places where residue can collect.

• Wide-mouth opening simplifies filling, ice insertion, and cleaning
• Minimal seams and durable materials reduce odor retention
• Quick-disconnect or secure coupling options compatible with common tubes

What durability and safety features are included?

Constructed from tough, flexible materials, the WLPS bladder tolerates flexing and repeated use while remaining lightweight. Materials are chosen to avoid common contaminants and to hold up under regular outdoor use.

• Robust, puncture-resistant film for long-term reliability
• Secure valve and closure systems to reduce leaks during activity
• Designed for repeated filling, freezing, and everyday outdoor abuse

Who is this for: The Source WLPS Low Profile 3L bladder is ideal for endurance athletes, bikepackers, trail runners, hikers, and commuters who need a high-capacity, fast-flow system that nestles close to the body and stays out of the way. Choose this bladder if you want a reliable, easy-to-use hydration reservoir with a high-flow valve and a slim profile that fits today's lightweight packs and vests.