COCOON Premium MummyLiner Cotton – Lightweight Camping Sleep Liner

Elevate your outdoor sleep experience

COCOON Premium MummyLiner is a lightweight, breathable cotton inner layer designed to slip inside your sleeping bag for extra softness and warmth during chilly nights under the stars. The fabric texture feels gentle against bare skin, encouraging a restful night after a day of exploration.

Made from 100% cotton, the liner uses a double-stitched construction for durability and long-term use. The boxed foot bed helps trap heat along the length of the sleeping surface, while a drawstring hood helps seal in warmth when conditions demand it. The wide top opening lets you adjust the ventilation or reach into the bag without waking others.

Key features at a glance

• 100% cotton fabric for softness and breathability
• Double-stitched durability for long trips
• Drawstring hood and boxed foot bed for a snug fit
• Wide top opening for effortless access
• Machine washable for quick cleaning on extended journeys
• Breathable and quick-drying to stay comfortable

Warmth and comfort in the field

In camp, temperatures can drop quickly. This MummyLiner can contribute to a warmer feel inside your sleeping arrangement, with a warmth boost up to around 5.3°F in favorable scenarios. It also adds a soft buffer against fabrics and zippers, reducing irritation during long nights.

Practical uses

• Backcountry adventures: lightweight warmth that travels easily
• Car camping: keep your sleeping area fresh with simple washing between trips
• Hostel or budget travel: an extra layer of warmth that doesn't take up much space

Care and transport

Machine washable for quick cleanup. Air dry to preserve softness, and store in a dry, breathable bag when not in use.

Who should consider it?

Ideal for campers who want a lightweight, breathable extra layer that doesn't add bulk. It pairs well with most mummy bags and is simple to tuck into a backpack or gear bag.