MISSION Cooling Helmet Liner — Digital Camo Gray, Slim UPF 50 Cooling Liner for Helmets & Hardhats

MISSION Cooling Helmet Liner in Digital Camo Gray is a lightweight, wearable liner that cools instantly when wet, fits under helmets and hardhats, and offers UPF 50 sun protection.

Whether you ride, work outdoors, or play sports, this helmet liner is engineered to keep your head cooler and more comfortable beneath helmets, hardhats, and other headgear. Made from breathable fabric and featuring HydroActive Wet-to-Cool Technology, it activates quickly with water or sweat, remains washable and odor-resistant, and compacts down small enough to stash in a pocket or bag.

How does the liner cool my head so quickly?

The liner uses HydroActive Wet-to-Cool Technology that pulls heat away as moisture evaporates, producing a rapid cooling effect. When wetted and waved, the fabric can feel significantly cooler within seconds and maintain a lowered temperature for extended periods.

• Wet, wring, and wave activation for instant cooling.
• Evaporative cooling lowers surface temperature quickly.
• Cooling effect can last up to two hours before reactivation.
• Technology is integrated into the fabric and won’t wash out.

Will it fit and sit comfortably under my helmet or hardhat?

The MISSION liner is designed with a slim profile and a breathable mesh crown so it tucks under most helmets and hardhats without adding bulk. Its universal fit accommodates a range of head sizes and stays in place during movement.

• Slim construction fits under helmets and protective gear.
• Mesh crown enhances airflow and reduces pressure points.
• Stretch fabric adapts to different helmet shapes and sizes.
• Unisex design suitable for men and women.

How durable and practical is it for everyday use?

This liner is built for regular use: it’s machine washable, resists odors, and retains its cooling properties wash after wash. Lightweight and packable, it’s made to be carried and reused during long days outdoors or on the job.

• Machine washable for easy care and hygiene.
• Proprietary cooling finish remains effective after laundering.
• Odor-resistant fabric keeps it fresher between washes.
• Compact size fits in a pocket or small pouch for portability.

How does it protect from the sun while keeping you cool?

Alongside its cooling performance, the liner provides UPF 50 protection to shield the scalp and forehead from harmful UV rays. This combination helps reduce heat stress and sun exposure in high-sun environments without adding heavy insulation.

• UPF 50 blocks a large portion of UV radiation.
• Thin fabric balances sun protection and breathability.
• Works well under open-vent or closed-vent helmets.
• Ideal for long outdoor shifts, rides, and sunny conditions.

Who is this for? The MISSION Cooling Helmet Liner is made for commuters, cyclists, construction and utility workers, athletes, and anyone who wears a helmet or hardhat and needs fast, portable cooling plus sun protection. If you frequently work or play in heat, need a compact cooling solution to carry with you, or want a washable liner that stays odor-free and effective over time, this liner is designed to meet those needs.