The THERMOLITE® Reactor™ Fleece sleeping bag liner is a luxuriously soft and super warm liner that can bump up the warmth of your sleeping bag considerably. It can also be used as a stand-alone sleeping bag in warmer climates and has a quarter length zipper to control temperature and allows the user to get in and out of easily. The hollow core fibers that make up this fabric trap heat effectively, keeping you toasty warm.  If you're looking for a high warmth to weight ratio or a lightweight summer bag, this is an ideal choice.

• Adds up to 32°F (18°C) of warmth to a sleeping bag
• Technical mummy shape with one hand, easy to operate, drawstring hood
• Quarter zip makes it easy to get in and out
• Can be used as a stand-alone sleeping bag in warmer temperatures
• Packs into its own Ultra-Sil™ stuff sack

• Dimensions: 6 ft 6 in x 28 in (200 x 70 cm)
• Stuff Sack Size:9 x 5 in (22 x 13 cm)
• Weight: 14.8 oz (420 g)

• Thermolite fleece

The origins of Sea to Summit began in 1983 in Perth, Western Australia - a time when lightweight, outdoor products were hard to find in Australia. The original products were developed to outfit an audacious attempt to climb Mt Everest by beginning the ascent at sea level. This gear would need to work at every altitude over several months and be light and durable enough for the 5 month trek. The expedition was a success and so was the gear and the Sea to Summit brand was born.