Best Sea to Summit Sleeping Bag Liners of 2025

The Reactor Extreme Sleeping Bag Liner enhances your outdoor experience with its innovative design. Made from Thermolite Pro fabric, it reflects your body heat, providing essential warmth for a 1-season sleeping bag and boosting insulation for 3-season use. Constructed with 50% eco-friendly materials, it ensures you can enjoy your adventures sustainably. Additionally, it features an easy-care design, being machine washable and packing compactly into its Ultra-Sil stuff sack, making it convenient for travel. This liner is particularly beneficial for winter camping, as it extends the warmth of your sleeping bag or serves as a standalone option in milder weather.

The SEA TO SUMMIT Sleeping Bag Liner offers moisture-wicking comfort with its blend of Coolmax EcoMade polyester and Tencel Lyocell, ensuring you stay dry and comfortable in humid conditions. Its versatile design includes a drawcord hood, allowing you to adjust for comfort easily, even in low light. Lightweight and portable, it packs compactly into its own stuff sack, making it an ideal choice for travel and backpacking. This liner is perfect for creating a hygienic sleeping environment while enjoying warm weather adventures.

The Sea to Summit Liner is designed to enhance your sleeping experience. Its Silk Blend material not only adds warmth but also a touch of luxury to your sleeping bag. The liner features hollow-core Thermolite Pro fibres, which create a warmth-trapping layer, ensuring you stay cosy throughout the night. With infra-red absorbing ceramic pigments, it promotes better heat retention. Additionally, the HeiQ odour control technology keeps the liner feeling fresh, even after prolonged use, making it ideal for extended trips.

The AREACTOR Sleeping Bag Liner by Sea to Summit is designed to enhance your sleeping experience. It is lighter and more packable than traditional fleece, making it an excellent choice for travellers. The mummy shape with a box foot provides extra comfort and warmth, ensuring you stay cosy throughout the night. With a draw cord hood featuring a mini cord lock, you can easily adjust the fit to keep warmth in and cold out. This liner conveniently packs into its own compact stuff sack, making it easy to carry on your adventures.

The Thermolite Reactor Liner by Sea To Summit is designed for convenience and comfort during your travels. It packs neatly into its own Ultra-Sil Cordura stuff sack, making it easy to carry. The liner features 110g/m Thermolite insulation in the core body and foot bed areas, ensuring warmth on chilly nights. Its short mummy shape with a box foot allows for a snug fit while still offering room for movement. A draw cord hood with a mini cord lock lets you adjust the fit for added warmth, keeping you cosy throughout the night.

The Sea to Summit Liner enhances your travel or camping experience with its focus on comfort and hygiene. Made from a lightweight TENCEL Lyocell and polyester blend, it features HeiQ odour control technology, ensuring freshness even after prolonged use. The stretch-knit fabric and rectangular design offer you the freedom to move comfortably, while the integrated pillow sleeve is perfect for use with rectangular sleeping bags or as a protective layer against hotel sheets. This way, you can enjoy a cleaner and more comfortable sleep wherever you are.

The Breeze Sleeping Bag Liner is treated with Permethrin, making it a fantastic choice for camping and travel. Its TENCEL Lyocell fabric offers luxurious comfort and stretch, ensuring you have a restful night’s sleep. With Coolmax fabric technology, it effectively wicks moisture away from your skin, helping you stay dry. Additionally, the HeiQ fresh odour control feature keeps the liner fresh and hygienic, even after extended use, adding to your overall convenience while on the go.

The Traveller Sleeping Bag Liner by Sea to Summit is an excellent choice for camping enthusiasts. Made from premium stretch knit fabric, it can expand to double its width, ensuring a snug fit for all body types. You will enjoy a luxuriously comfortable sleeping experience while also extending the life of your sleeping bag by keeping it clean. Additionally, the anti-microbial protection helps keep the liner fresh and hygienic, providing you with a pleasant, odour-free environment for a good night's sleep.

The Sea To Summit Liner is crafted from premium AA Grade ripstop silk, ensuring durability and comfort during your camping trips. Its polyester and Lycra stretch gussets enhance your overall comfort, allowing for greater mobility while you sleep. This liner also boosts the thermal performance of your sleeping bag, keeping you warmer on chilly nights. With double folded and reinforced seams, you can trust that it will withstand the rigours of outdoor adventures.

The Sea To Summit Liner is a practical addition to your camping gear. Its colourfast and pre-shrunk fabric ensures that it maintains its vibrant navy blue hue even after multiple washes, providing you with a durable option. Packaged in its own stuff sack, it offers easy portability, allowing you to pack light and efficiently. The double folded seams enhance the liner's strength, ensuring it can withstand your adventures while keeping you comfortable during your nights outdoors.