Synergy Sleep Liner Regular

The Therm-a-Rest Synergy™ Sleeping Bag Liner is designed to extend the life and performance of your sleeping bag while adding comfort and warmth. Made from soft, stretch-knit polyester, it feels cozy against the skin and adds up to 5°F (3°C) of warmth to your sleep system. Perfect for backpacking in Rocky Mountain National Park or camping in Estes Park, the Synergy™ liner also protects your sleeping bag from sweat, oils, and dirt—helping maintain loft and insulation.

Lightweight and machine washable, this liner makes it easy to keep your sleeping bag clean and fresh without the hassle of full washes.

• Adds up to 5°F/3°C of warmth – boosts sleeping bag performance.

• Soft, stretch-knit polyester – cozy and comfortable against skin.

• Protective barrier – keeps sweat and oils from damaging insulation.

• Machine washable – easy to clean and maintain.

• Lightweight & packable – fits easily into any camping setup.

• Extends sleeping bag life – keeps insulation lofted and efficient.