Sea to Summit Reactor Lightweight Sleeping Bag Liner 1

Sea to Summit Reactor Lightweight Sleeping Bag Liner - In Use 2

Sea to Summit Reactor Lightweight Sleeping Bag Liner - Packed 3

Sea to Summit Reactor Lightweight Sleeping Bag Liner - Fabric 4

Sea to Summit Reactor Lightweight Sleeping Bag Liner - Toggles 5

Sea to Summit Reactor Lighweight Sleeping Bag Liner

Sea to Summit

$78.21

$89.90

Save 13%

Length:

Short Regular Long

Variant

1% for the Planet We'll donate $0.78 from this purchase to environmental charities.

Features

Boosts sleep system warmth – Thermolite® Pro fabric with Far Infrared technology and hollow-core fibres traps and reflects body heat with minimal bulk
Freedom to move – Stretch-knit construction and shaped arm openings allow unrestricted movement for natural sleeping comfort
Technical shape with hood – Ergonomic design and fitted hood provide optimal warmth and comfort without added weight
Stay fresher for longer – HeiQ Fresh odour control keeps the liner feeling clean even after extended use
Seamless sleep system integration – Shoulder snap connectors attach easily to Sea to Summit sleeping bags for quick, hassle-free entry and exit
Easy to keep clean – Machine-washable design simplifies care while reducing wear on your sleeping bag
Lower-impact materials – Made with certified recycled fibres and bluesign® APPROVED materials for environmentally responsible performance

Specifications

Weight

S: 235g
R: 255g
L: 260g

Certification

RCS - 1114661

Dimensions

Short: 80 x 178cm
Regular: 80 x 193cm
Long: 80 x 198cm

Ideal for

Backpacking, Cycle touring, Paddle touring

Packed dimensions

10 x 10 x 18cm

Recommended user height

S: 170cm
R: 183cm
L 198cm

Sea to Summit Reactor Lighweight Sleeping Bag Liner

Optimised for minimal weight and maximum warmth, the Reactor Lightweight boosts sleep system performance with advanced Thermolite Pro fabric. Infrared-absorbing ceramic pigments and hollow-core fibres trap body heat, adding up to 4°C / 7°F with minimal bulk—perfect for ultralight expeditions.

Stretch-knit construction and articulated arm openings allow full freedom of movement. Treated with HeiQ Fresh odour control, it’s quick-drying, machine washable, and helps extend your sleeping bag’s lifespan by reducing wash frequency.

Best Use:Backpacking, Cycle touring, Paddle touring

Type:Thermal Liner

Weight:9oz | 255g

Length:76in | 193cm

Packed Size:3.9 x 7.1 x 3.9in | 18 x 10 x 10 cm