{"product_id":"reactor-insulated-sleeping-bag-liner-thermolite-pro-warmth","title":"Reactor Insulated Sleeping Bag Liner - Thermolite Pro Warmth","description":"\u003cp\u003eIn this review the Sea to Summit Reactor Insulated Sleeping Bag Liner is presented as a lightweight, packable upgrade for campers who want more warmth and better hygiene from their sleeping system. The single biggest reason to buy is its use of \u003cstrong\u003eThermolite Pro\u003c\/strong\u003e knitted hollow-core fibers and infrared ceramic pigments that reflect body heat back to the wearer, delivering measurable warmth without a heavy sleeping bag. It works as an insulating layer inside any shape of bag and doubles as a light standalone liner on warm nights.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermolite Pro:\u003c\/strong\u003e Knitted hollow-core fibers with infrared ceramic pigments reflect your body heat back, increasing warmth without bulk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsulated design:\u003c\/strong\u003e Adds extra warmth and keeps the inside of your sleeping bag cleaner for better personal hygiene on multi-night trips.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrawcord footbox:\u003c\/strong\u003e The footbox can be opened or closed to regulate temperature and integrates with Sea to Summit Free-Flow Zip systems on select bags.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStretch knit fabric:\u003c\/strong\u003e The mummy-shaped liner offers freedom of movement and conforms to sleeping bags of different shapes for a comfortable fit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeiQ Fresh treatment:\u003c\/strong\u003e Odor control technology helps the liner stay fresh after extended use so it needs washing less often.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifetime guarantee:\u003c\/strong\u003e Backed by the Sea to Summit Guarantee for the lifetime of the product, providing long-term confidence in construction.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe Reactor liner is best for backpackers and campers who want to boost the warmth of an existing sleeping bag without buying a heavier bag, and for travelers who want a hygienic, washable barrier between themselves and shared or rental bedding. Its lightweight nature and stretch knit also suit warm-season campers who sometimes use it as a single-layer sleeping bag.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include ultralight thru-hikers chasing the absolute lowest ounces, since any added insulation increases weight, and cold-weather mountaineers who need a rated sleeping bag system rather than a liner to guarantee survival warmth in extreme conditions.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEffective warmth boost from \u003cstrong\u003eThermolite\u003c\/strong\u003e technology without bulky layers.\u003c\/li\u003e\n\u003cli\u003eDrawcord footbox gives good temperature control and compatibility with compatible Sea to Summit zippers.\u003c\/li\u003e\n\u003cli\u003eLightweight, stretchy fabric provides comfort and doubles as a light bag on warm nights.\u003c\/li\u003e\n\u003cli\u003eHeiQ Fresh treatment reduces odor buildup after repeated use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot a substitute for a fully rated cold-weather sleeping bag when temperatures drop very low.\u003c\/li\u003e\n\u003cli\u003eThe insulated liner adds some weight compared with uninsulated liners used solely for hygiene.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSea to Summit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial technology\u003c\/td\u003e\n\u003ctd\u003eThermolite Pro knitted hollow-core fibers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOdor control\u003c\/td\u003e\n\u003ctd\u003eHeiQ Fresh treatment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFootbox\u003c\/td\u003e\n\u003ctd\u003eDrawcord footbox, opens or closes and integrates with Free-Flow Zip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShape\u003c\/td\u003e\n\u003ctd\u003eMummy-shaped liner with stretch knit fabric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003eLifetime Sea to Summit Guarantee\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Sea to Summit Reactor Insulated Sleeping Bag Liner is a practical, well-made way to add warmth and hygiene to your sleep system without buying a heavier bag; it is good value for campers who want versatility and comfort. Choose this liner if you need a reliable warmth boost, odor control, and a comfortable stretch fit, but opt for a rated sleeping bag for very cold expeditions.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan the liner be used on its own?\u003c\/strong\u003e\u003cbr\u003eThe liner can serve as a lightweight sleeping bag on warm nights, but it is intended primarily to supplement a sleeping bag for added warmth.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it fit most sleeping bags?\u003c\/strong\u003e\u003cbr\u003eThe knitted, stretchy fabric and mummy shape allow it to work seamlessly with sleeping bags of different shapes, and the drawcord footbox integrates with select Free-Flow Zip systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does odor control work?\u003c\/strong\u003e\u003cbr\u003eHeiQ Fresh treatment helps reduce odor buildup so the liner stays fresher after extended use, reducing washing frequency.\u003c\/p\u003e","brand":"Sea to Summit","offers":[{"title":"Default Title","offer_id":48240582164699,"sku":"B0CT67MSSN","price":79.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51qJoRiUJpL._AC_SL1500.jpg?v=1770917333","url":"https:\/\/gearmusthave.com\/products\/reactor-insulated-sleeping-bag-liner-thermolite-pro-warmth","provider":"GearMustHave","version":"1.0","type":"link"}