COCOON Premium Cotton MummyLiner Ultramarine Blue | Lightweight Sleeping Liner

Meet the COCOON Premium Cotton MummyLiner

Slip into a soft, cocoon‑like layer with the COCOON Premium Cotton MummyLiner in Ultramarine Blue. Designed to work with standard mummy sleeping bags, this liner adds warmth and versatility for outdoor nights, hostel stays, or travel.

Made from breathable cotton fabric, it feels gentle against the skin and offers quiet warmth that helps you maintain a comfortable sleeping environment. The rich ultramarine color adds a premium look and helps you spot your gear in shared spaces.

Key benefits at a glance

• Adds up to 5.3°F of warmth to your sleeping bag, helping you feel cozier in cool conditions.
• Wide top opening for easy entry and exit, reducing fuss when you’re on the move.
• Contoured foot end designed to match the shape of your sleeping bag for better insulation and comfort.
• Double-stitched throughout for enhanced durability on rugged outdoor adventures.
• Includes a compact, lightweight stuff sack for simple packing and portability.

Real-world uses

• Camping trips where you want an extra warmth layer without adding bulk.
• Travel or hostel stays to keep your own clean liner between you and shared bags.
• Backpacking or car camping, thanks to the liner’s packable design.
• Cool nights at the campsite where a little additional warmth makes a difference.

Care and storage tips: Machine wash cold, tumble dry low. Store in the provided stuff sack when not in use to preserve softness and shape.