Sea to Summit Breeze Lightweight Sleeping Bag Liner

The Sea to Summit Breeze Sleeping Bag Liner is a moisture-wicking liner for backpacking, cycle touring, and paddle touring, made from a stretchy blend of 70% COOLMAX® EcoMade recycled polyester and 30% TENCEL™ Lyocell. It is available in Short, Regular, and Long mummy cuts and a Rectangular with Pillow Sleeve cut, weighing from 265g to 330g depending on size.

Moisture Control Without Added Bulk

COOLMAX® EcoMade fibers are channeled to pull moisture away from skin and disperse it across a larger surface area, where it evaporates faster. In humid or warm conditions, that means sleeping without the clammy, sweaty feeling that can interrupt rest. The 30% TENCEL™ Lyocell content adds a smooth, next-to-skin softness that complements the wicking action. The two fibers work together to regulate microclimate, and the Short variant weighs 265g.

Stretch That Fits Any Bag Shape

The Breeze liner is knitted rather than woven, giving it four-way stretch that conforms to mummy, semi-rectangular, and rectangular sleeping bags without bunching or restricting movement. Mummy-cut sizes (Short, Regular, Long) add a drawcord footbox for ventilation control, arm openings for freedom of movement, and a technical hood with Climate Control shoulder openings to maximize mobility. The knitted structure also traps more insulating air than a woven liner, adding a small amount of warmth to whatever bag it is paired with.

Odor Resistance That Refreshes With Every Wash

The Breeze liner is treated with HeiQ Fresh FFL, a biocide-free odor control technology that uses bio-based amino sugar polymers to absorb and neutralize body odor during use. When the liner is machine washed, odor-causing compounds are released and the polymer is refreshed, restoring its effectiveness for the next trip. Because the liner takes the brunt of body contact, washing the liner instead of the sleeping bag preserves the bag's loft and extends its usable life. The liner is machine washable with standard detergent and can be machine dried on a cool or low setting or air dried.

Features

• Fabric blend: 70% COOLMAX® EcoMade recycled polyester and 30% TENCEL™ Lyocell for moisture wicking and next-to-skin comfort
• Four-way stretch knit: fits mummy, semi-rectangular, and rectangular sleeping bags without bunching
• HeiQ Fresh FFL odor control: biocide-free amino sugar polymer treatment that refreshes with each wash
• Mummy-cut features: drawcord footbox, arm openings, technical hood, and Climate Control shoulder openings (Short, Regular, Long only)
• Pillow sleeve: Rectangular with Pillow Sleeve variant includes a sleeve to keep a pillow in place
• Lower-impact materials: certified recycled and bluesign APPROVED construction

Specifications

Who This Is For and Isn't

The Breeze liner suits backpackers, cycle tourers, and paddle tourers who want to manage moisture and odor during warm-weather trips, extend the wash life of an existing sleeping bag, or add a lightweight hygiene layer when traveling. The Rectangular with Pillow Sleeve variant is well suited to hostel, hotel, or travel use where a pillow sleeve is useful.

The Breeze liner is not a standalone sleeping bag and carries no insulation rating; it does not replace insulation in cold conditions. The drawcord footbox, arm openings, and technical hood are present only on the mummy-cut Short, Regular, and Long sizes, not on the Rectangular with Pillow Sleeve variant.

Common Questions

Can the Breeze liner be machine washed?

The Sea to Summit Breeze liner is machine washable with standard detergent. Fabric softeners should be avoided because they reduce the wicking performance of the COOLMAX fibers. The liner can be machine dried on a cool or low setting without dryer sheets, or air dried.

Does the Breeze liner keep you cool?

The Breeze liner does not actively lower temperature, but its COOLMAX EcoMade fibers wick moisture away from skin effectively, preventing the sweaty or clammy feeling that can occur in humid conditions. The result is a more comfortable microclimate without added insulation.

How does the HeiQ Fresh odor control treatment work?

The Breeze liner is treated with HeiQ Fresh FFL, which uses bio-based amino sugar polymers to absorb and neutralize odors during use. When the liner is machine washed, odor-causing compounds are released and the polymer is refreshed, restoring its effectiveness for subsequent trips.

Does the Breeze liner add warmth to a sleeping bag?

The Breeze liner adds a small amount of warmth when used inside a sleeping bag. Any additional layer traps insulating air, and the knitted structure of the Breeze liner traps more air than a woven liner, providing a modest warmth benefit beyond a bare bag.

Which size should I choose?

The Short fits users up to 170cm (66.9in), the Regular fits up to 185cm (72.8in), and both the Long and Rectangular with Pillow Sleeve fit users up to 198cm (77.9in). The Rectangular with Pillow Sleeve is the only variant with a pillow sleeve; the Short, Regular, and Long are mummy-cut with a drawcord footbox and arm openings.