--- product_id: 666660107 title: "Reactor Sleeping Bag Liner, Extreme Standard (85 x 31.5)" brand: "sea to summit" price: "€ 190.29" currency: EUR in_stock: true url: https://www.desertcart.hr/products/666660107-reactor-sleeping-bag-liner-extreme-standard-85-x-31-5 store_origin: HR region: Croatia --- # Up to +25°F warmth boost Stretch-knit Thermolite Pro fabric Adjustable drawcord footbox Reactor Sleeping Bag Liner, Extreme Standard (85 x 31.5) **Brand:** sea to summit **Price:** € 190.29 **Availability:** ✅ In Stock ## Summary > 🔥 Sleep warmer, move freer, stay fresher — your ultimate camp upgrade! ## Quick Answers - **What is this?** Reactor Sleeping Bag Liner, Extreme Standard (85 x 31.5) by sea to summit - **How much does it cost?** € 190.29 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/666660107-reactor-sleeping-bag-liner-extreme-standard-85-x-31-5) ## Best For - sea to summit enthusiasts ## Why This Product - Trusted sea to summit brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Stretch-Knit Freedom:** Experience unrestricted movement with a mummy-shaped liner that flexes with you. - • **Odor-Control Freshness:** HeiQ Fresh technology keeps your liner smelling clean, even after extended use. - • **Thermolite Pro Warmth Boost:** Add up to 25°F of cozy heat to your sleep system, perfect for chilly nights. - • **Versatile Footbox Ventilation:** Drawcord footbox opens for breathability or closed for snug warmth, plus easy camp mobility. - • **Lifetime Sea to Summit Guarantee:** Invest in durability with a product backed for life, built for the adventurous professional. ## Overview The Sea to Summit Reactor Sleeping Bag Liner Extreme Standard (85 x 31.5) uses advanced Thermolite Pro hollow-core fibers with infrared ceramic pigments to reflect body heat, adding up to 25°F of warmth. Its stretch-knit fabric ensures a perfect fit and freedom of movement, while the adjustable drawcord footbox offers customizable ventilation and mobility. Enhanced with HeiQ Fresh odor control, this mummy-shaped liner is designed for all-season use and backed by a lifetime guarantee, making it an essential upgrade for any serious outdoor enthusiast. ## Description Sea to Summit Reactor series insulated sleeping bag liners can extend the comfort range and improve personal hygiene of any sleeping bag. Thermolite hollow core fibers are constructed like the fur of a polar bear, efficiently trapping heat and providing a luxuriously soft, comfortable feel. The stretch-knit fabric provides optimal comfort, and ensures the Reactor fits any sleeping bag. Additionally, the drawcord footbox offers plenty of ventilation and the versatility of walking around camp while still wearing your liner. Available in three different weights, Reactor technical liners make your existing sleeping bag warmer and more versatile. The Regular Liner uses hollow-core Thermolite Pro fabric with infra red-absorbing ceramic pigments and Thermolite EcoMade fibers. This lightweight fabric adds up to 14F of warmth to your sleep system. The Extreme Liner features a thicker hollow-core Thermolite Pro fabric to add up to 25F of warmth to your sleep system. The Fleece Liner employs hollow-core Thermolite Pro fibers in a grid-pattern to deliver our warmest sleeping bag liner which adds up to 32F of warmth to your sleep system. ## Features - Insulated sleeping bag liner adds extra warmth and personal hygiene to any sleeping bag. - Thermolite Pro technology using knitted, hollow-core fibers and absorbing infrared ceramic pigments to reflect your body's heat back to the wearer for enhanced warmth and comfort - Drawcord footbox can be opened or closed for optimal comfort and integrates perfectly with the footbox of our Free-Flow Zip system in select Sea to Summit sleeping bags - HeiQ Fresh odor control technology helps keep the liner fresh even after extended use - Knitted fabric provides incredible stretch and freedom of movement in this mummy-shaped liner and works seamlessly with sleeping bags of any shape, Sea to Summit Guarantee is offered for the Lifetime of this product ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | Sea to Summit | | Colour | Orange | | Occupancy | 1 | | Shape | Mummy | | Seasons | All Seasons | | Temperature Rating | 6 to 15 degrees Celsius | | Age Range (Description) | Adult | | Material | thermolite | | Fill Material | Thermolite | | Closure Type | Drawstring | | Outer Material | thermolite | | Fabric Type | thermolite | | Size | 85 x 31.5 | | Global Trade Identification Number | 09327868158331 | | Manufacturer | Sea to Summit | | Item model number | ASL031071-190804 | | ASIN | B0CT69SWJP | ## Product Details - **Brand:** Sea to Summit - **Colour:** Orange - **Occupancy:** 1 - **Shape:** Mummy - **Seasons:** All Seasons ## Images ![Reactor Sleeping Bag Liner, Extreme Standard (85 x 31.5) - Image 1](https://m.media-amazon.com/images/I/51y1ZEIIHRL.jpg) ## Available Options This product comes in different **Style Name** options. ## Frequently Bought Together - Sea to Summit Reactor Insulated Sleeping Bag Liner - Sea to Summit Drylite Towel, Lightweight Camping and Travel Towel - Rainleaf Microfiber Towel Perfect Travel & Gym & Camping Towel. Quick Dry - Super Absorbent - Ultra Compact - Lightweight. Suitable for Trip, Beach, Shower, Backpacking, Pool --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/666660107-reactor-sleeping-bag-liner-extreme-standard-85-x-31-5](https://www.desertcart.hr/products/666660107-reactor-sleeping-bag-liner-extreme-standard-85-x-31-5) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-20*