Sleeping bag SEA TO SUMMIT Breeze Mummy Tencel/Polyester, 80 mm width, 2160 mm length, 290 g

The SEA TO SUMMIT Breeze Mummy is a lightweight mummy-style sleeping bag liner made from a breathable blend of COOLMAX® EcoMade and Tencel Lyocell fibres with a polyester component. Measuring 2160 mm in length and approximately 80 mm in width at the stated point, and weighing 290 g, it is designed for warm-weather camping, backpacking and travel where compact pack size and low weight matter. The fabric wicks moisture, dries quickly and reduces the need to wash your sleeping bag by providing a hygienic barrier between you and the bag.

Advantages

The Breeze liner combines moisture-wicking COOLMAX® EcoMade and soft biobased Tencel for effective climate control on warm nights. Its super-stretch knitted fabric and tailored mummy shape with a drawcord footbox provide freedom of movement and ventilation whether used inside a sleeping bag or on its own. The liner is machine washable, quick-drying and treated with HeiQ Fresh odour control to keep it feeling fresh during extended use. Materials used include certified recycled and bluesign APPROVED components to reduce environmental impact.

Suitable for

• Warm-weather backpacking and minimalist overnight trips
• Travel and hostel stays where a hygienic sleep layer is preferred
• Using inside a sleeping bag to reduce washing and extend the bag’s lifespan
• Camping when extra ventilation and freedom of movement are needed

When it may not be suitable

This liner is intended for warm conditions and adds minimal insulation; it is not a substitute for an insulating sleeping bag in cold environments. Users needing substantial warmth or extreme cold-weather protection should choose a dedicated insulated sleeping bag or add appropriate thermal layers.

Key specifications

• Type: Mummy-style sleeping bag liner
• Primary materials: COOLMAX® EcoMade blend, Tencel Lyocell, polyester knit
• Length: 2160 mm
• Approximate width (stated): 80 mm
• Weight: 290 g
• Features: drawcord footbox (mummy), hood and shoulder openings for mobility, pillow sleeve on Traveller variant
• Care: machine washable, quick-drying
• Treatments: HeiQ Fresh odour control
• Certifications: uses certified recycled components and bluesign APPROVED materials

How to use

Unpack the Breeze Mummy liner and insert it into your sleeping bag or use it on its own inside a tent. For improved ventilation, use the drawcord footbox to open or close airflow as needed. The hood and shoulder openings allow arm movement without removing the liner. After use, machine wash according to the care label and allow to dry fully before storage to maintain the HeiQ Fresh treatment and fabric performance.

What to consider before purchase

• Designed primarily for warm-weather use — not intended as primary insulation in cold conditions
• Check your sleeping bag shape and size to ensure compatibility with a mummy-style liner
• Decide between Mummy and Traveller variants if you need a pillow sleeve or different fit features
• Consider care requirements and drying time when planning multi-day trips

Usage recommendations

Use the Breeze Mummy liner inside your sleeping bag to reduce washing frequency and extend the bag’s loft, or use it standalone for lightweight, hygienic sleep in warm conditions. Adjust the drawcord footbox for ventilation and use the hood and shoulder openings to maintain mobility.