Our collection of thermal liners offers additional warmth to ensure comfortable sleep in cold climates. This collection is made from quality fabrics and uses the latest technology, so you can combine it with our sleeping bags to create a cosy and comfortable sleeping system suitable for cold and arctic conditions.

• 100% polyester
• Thermolite® Pro features hollow fibres like standard Thermolite®, but with the addition of permanent ceramic pigments that absorb infrared radiation from the body and reflect it back to the user
• Recycled Thermolite® EcoMade fibres are made from 100% textile waste, carry GRS certification and offer the same quality and durable lightweight warmth as their original polymer counterparts, but with a lower carbon footprint.
• Sea to Summit liners are treated with HeiQ Fresh FFL technology, which contains no biocides and is highly effective at suppressing odour, using a bio-based Amino Sugar polymer to neutralise body odour.
• SUSTAINABILITY: The fabric is made from 50% recycled yarn.
• Yarn 1: 50% Thermolite® Pro yarn
• YARN 2: 50% Thermolite® EcoMade yarn: Fibre made from 100% recycled sources.
• FABRIC TECHNOLOGY: Thermolite® Far Infrared
• FABRIC TREATMENT: Bio-based odour control
• THERMAL BOOST: 1-season sleeping bag +12%.

We offer a 30-day period for returning or exchanging goods if, for any reason, you are not satisfied with your order.

For more information, please see our Return Policy here.

Orders received by 14:00 are dispatched the same day. Delivery usually takes place on the next business day, depending on the selected shipping method. During busy periods, please allow 1–3 business days for order processing.

Free delivery from €200 / for oversized shipments from €400

Free of charge, ready for pickup on the next business day

For more information, please see our Delivery page.