Thermal Fleece Skull Cap Under-Helmet Liner for Men and Women

Thermal Fleece Skull Cap and Under-Helmet Liner

Quick answer: This close-fitting thermal fleece skull cap adds cold-weather coverage for running, cycling, hiking and commuting. Its low-profile shape can also be worn under a compatible bike, ski or work helmet after the helmet fit is rechecked.

• Extended fleece coverage around the ears
• Low-profile shape for use under compatible bike, ski and work helmets
• Side openings designed to help route compatible eyewear temples
• Available in black and grey

Fit and use notes

• Measure and confirm comfort before extended use.
• If worn under a helmet, recheck that the helmet sits level and remains securely adjusted.
• Eyewear fit varies by frame shape and temple thickness.
• Warmth and moisture comfort vary with weather, exertion and layering.

This skull cap is an apparel layer for cold-weather comfort. It does not replace a certified helmet or other activity-specific protective equipment.

Running skull cap FAQ

What is a running skull cap?

A running skull cap is a close-fitting head layer that helps cover the head and ears in cold weather without the bulk of a traditional winter hat.

Can this skull cap be worn under a bike or ski helmet?

It has a low-profile shape for use under compatible helmets. After adding any liner, recheck that the helmet sits level, remains stable and still fits according to its instructions.

Can it be used with glasses?

The side openings are designed to help route compatible eyewear temples. Actual comfort depends on frame shape and temple thickness.

Complete your cold-weather setup

Browse snow sports and winter gear, compare the ski and snowboard helmet, or shop bike helmets for compatible cold-weather activities.