For the colder car camping adventures and vehicle-based getaways, the Sea to Summit Trek -18C Down Sleeping Bag offers enough room to groove and a lofty level of comfort.

The lightweight, water-resistant, 20D recycled polyester shell and lining ensures durability beyond the backyard in various weather conditions and climates. A -11°C comfort rating and -18°C lower limit has it suitable for icy blasts in below-zero climates, while the Free Flow Zip system features durable #5 full-length primary, half-length secondary, and footbox zippers, finished with zip plows, sliders, and a down-filled draft tube for easy, snatch-free use. The Semi Rectangular Fit also offers both a roomy and comfortable fit, ideal for car camping and shorter outdoor adventures.

An RDS certified 650+ FILL Power goose down provides both comfort when unpacked and a compact pack down, treated with ULTRA-DRY down water-repellent to protect from moisture on the damper days off the grid. Minimise cold spots thanks to vertical and horizontal chest baffles present in both the lower-half and base, while box-wall baffles exist throughout the construction of bag. Plus, fitted front and tubular back collar drafts help to trap heat, while the hood offers a soft-touch adjustment and generous room for a regular-sized Sea to Summit pillow.

The Trek -18C Down Sleeping Bag by Sea to Summit is warm but weightless solution for the frostier off-road tours and four-wheeled travels.

• -11°C Comfort rating, -18°C Lower Limit rating
• 20D recycled polyester shell and lining for durability and comfort in various climates
• Fitted hood with generous room and soft-touch adjustments
• Hood fits a regular, separately available Sea to Summit pillow
• Double draft collars: fitted front and tubular back
• Single, synthetic-filled draft tube runs along top of all zippers
• Vertical chest and horizontal chest baffles in lower half and base
• Box-wall baffle construction throughout
• Semi Rectangular Fit offers spacious design for roomy and comfortable fit
• Free Flow Zip system: full-length #5 primary zipper with zip plow and 2 x sliders, half-length #5 secondary zipper with zip plow and 2 x sliders, and #5 footbox zipper with 2 x sliders
• RDS certified 650+ FILL Power goose down for comfort and compact packing
• ULTRA-DRY down water-repellent treatment for water resistance
• Compatible with separately available Sea to Summit quilts
• Compatible with separately available Sea to Summit women’s bags
• 26L compression bag included