Which sleeping bag liner should I choose?

For simplicity, Sea to Summit liners can be grouped into two main categories: Travel Liners and Backpacking Liners.

Travel Liners: Designed for comfort, cleanliness, and convenience when you’re on the move.
 

• Silk Blend (Rectangular)
  • Lightweight and compact – ideal for travel.
  • Easy to wash, keeping your sleep environment hygienic.
• Breeze (Rectangular)
  • Soft, stretch-knit fabric (feels like a quality T-shirt).
  • Great for travelers who want extra comfort.
  • Also available in the US with Insect Shield treatment for insect protection.
• Comfort Blend (Rectangular)
  • Cozy and breathable option for hotels, hostels, or car camping.

Backpacking Liners: Built to work inside your sleeping bag for warmth or comfort on the trail.

• Coolmax Breeze (Mummy-shaped)
  • Ideal for warm and humid conditions
  • Manages moisture by wicking perspiration, keeping you from feeling clammy
  • Comfortable enough to use alone in hot weather
  • Stretch-knit fabric makes it a favorite for both backpackers and travelers
• Thermolite Reactor
  • Adds warmth in colder conditions.
  • Hollow-core fibers trap heat, enhanced by the knitted structure and ceramic pigments.
  • Can double as a lightweight bag substitute in warm weather (not windproof).

New for 2024: Practical Design Upgrades

• Shoulder openings: Stretch your arms out for reading, sipping coffee, or venting heat.
• Footbox opening: Increases ventilation or allows you to “wear” the liner outside your bag for walking around camp or bathroom breaks.

Weight-conscious hikers

• The Silk Blend (Mummy-shaped) is the lightest option – the go-to for ultralight backpackers.

Care & Durability

• Wash your liner after every trip (or on zero days during thru-hikes).
• This protects your sleeping bag from oils, sweat, and dirt, dramatically extending its lifespan.
  
  

Fit Tip

If you’ve ever found a liner too restrictive – or if your sleeping bag has a non-traditional shape – choose a Breeze or Reactor liner. Their stretchy knitted fabric offers a much roomier feel.