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Thermal Liners

$128.99
in stock
The THERMOLITE® Reactor Fleece liner is Sea to Summit’s warmest sleeping bag liner. Read more
SEA TO SUMMIT
Sea To Summit Thermolite Reactor Fleece Liner
The THERMOLITE® Reactor Fleece liner is Sea to Summit’s warmest sleeping bag liner.
$128.99
$79.95
in stock
Lightweight layer inside your bag for additional warmth without bulk. Read more
BIG AGNES
Big Agnes Fireline Eco Sleeping Bag Half Liner
Lightweight layer inside your bag for additional warmth without bulk.
$79.95
$99.99$79.99
in stock
The Reactor Extreme uses our super insulating 110g/m² Thermolite fabric to seriously increase sleeping bag performance. Read more
SEA TO SUMMIT
Sea To Summit Reactor Thermolite Extreme
The Reactor Extreme uses our super insulating 110g/m² Thermolite fabric to seriously increase sleeping bag performance.
$99.99$79.99
$449.00$404.10
this item is temporarily out of stock - click to below to get notified
Ultra-light and technical, Sea To Summit's Spark Series bags are designed to keep you as warm as possible while minimising packed weight and size. Suitable to be used as a liner. Read more
SEA TO SUMMIT
Sea To Summit Spark 0 Booster Bag Liner - Long
Ultra-light and technical, Sea To Summit's Spark Series bags are designed to keep you as warm as possible while minimising packed weight and size. Suitable to be used as a liner.
$449.00$404.10
$399.00$359.10
in stock
Ultra-light and technical, Sea To Summit's Spark Series bags are designed to keep you as warm as possible while minimising packed weight and size. Suitable to be used as a liner. Read more
SEA TO SUMMIT
Sea To Summit Spark 0 Booster Bag Liner - Regular
Ultra-light and technical, Sea To Summit's Spark Series bags are designed to keep you as warm as possible while minimising packed weight and size. Suitable to be used as a liner.
$399.00$359.10
$399.00
this item is temporarily out of stock - click to below to get notified
Ultra-light and technical, Sea To Summit's Flame Series bags are designed to keep you as warm as possible while minimising packed weight and size. Suitable to be used as a liner. Read more
SEA TO SUMMIT
Sea To Summit Flame 0 Women’s Booster Bag Liner - Regular
Ultra-light and technical, Sea To Summit's Flame Series bags are designed to keep you as warm as possible while minimising packed weight and size. Suitable to be used as a liner.
$399.00
$89.99$71.99
in stock
The Reactor Compact Plus can increase sleeping bag performance by up to 11 degrees with dual-weight Thermolite Fabric. Read more
SEA TO SUMMIT
Sea to Summit - Thermolite Reactor Compact Plus
The Reactor Compact Plus can increase sleeping bag performance by up to 11 degrees with dual-weight Thermolite Fabric.
$89.99$71.99
$89.99$71.99
in stock
The Reactor is made from 80g/m Thermolite the lightest weight Thermolite fabric available. Read more
SEA TO SUMMIT
Sea To Summit - Thermolite Reactor Standard
The Reactor is made from 80g/m Thermolite the lightest weight Thermolite fabric available.
$89.99$71.99
$219.00
this item is temporarily out of stock - click to below to get notified
A versatile layer designed as a sleeping bag liner, travel accessory, or lightweight sleeping bag alternative. Read more
BIG AGNES
Big Agnes Merino Wool Sleeping Bag Liner
A versatile layer designed as a sleeping bag liner, travel accessory, or lightweight sleeping bag alternative.
$219.00