Stay Warm & Clean with a High-Quality Camping Sleeping Bag Liner

A sleeping bag liner is one of the most versatile pieces of travel gear you can own. Use it to add warmth to your sleeping bag on cold nights, as a standalone sheet in warm climates, or as a hygiene barrier in hostel bunks and guesthouses. Lightweight, packable, and easy to wash — it's the upgrade that makes every night's sleep better.

Travel Gear is an authorised Australian stockist for Sea to Summit, shipping from our Charlestown NSW warehouse with fast delivery across Australia.

Why Use a Sleeping Bag Liner?

• Add warmth: A liner can add 4–15°C to your sleeping bag's temperature rating depending on the material
• Hygiene: Keeps your sleeping bag clean — wash the liner instead of the bag after every trip
• Extend bag life: Reduces wear and soiling on the inside of your sleeping bag
• Standalone use: Use as a sheet in warm climates, hostels, or guesthouses where bedding quality is uncertain
• Packable: Compresses to the size of a water bottle — adds negligible weight to your hiking pack or carry-on backpack

Liner Materials Compared

• Silk: Lightest and most packable, adds ~4°C warmth, luxurious feel — best for warm climates and weight-conscious travellers
• Merino wool: Natural temperature regulation, odour-resistant, adds ~7°C — best for variable conditions
• Cotton: Soft and affordable, adds ~3°C — heavier and slower to dry, best for car camping
• Thermolite/synthetic: Maximum warmth addition (up to 15°C), fast-drying — best for cold conditions

Frequently Asked Questions

How much warmth does a sleeping bag liner add?

It depends on the material: silk liners add approximately 4°C, merino wool adds around 7°C, and synthetic/Thermolite liners can add up to 15°C. Check the individual product's temperature rating for exact figures.

Can I use a sleeping bag liner without a sleeping bag?

Yes — in warm climates (above 20°C at night), a silk or cotton liner works well as a standalone sheet. It's ideal for hostel travel where you want a clean barrier between yourself and shared bedding.

Are Sea to Summit liners worth it?

Yes — Sea to Summit liners are the benchmark for quality and packability. Their Thermolite and silk liners are used by serious travellers and adventurers worldwide. As an authorised Australian stockist, Travel Gear carries the full Sea to Summit range with warranty support for Australian customers.

What is the difference between a silk and a Thermolite liner?

Silk liners are lighter (typically 100–150g), more packable, and add around 4°C — best for warm climates and minimalist travel. Thermolite liners are heavier (200–350g) but add up to 15°C — the right choice for cold conditions or extending a 3-season sleeping bag into winter. For a full outdoor gear packing guide, see our ultimate Australian packing checklist.