Sea To Summit Extreme Reactor Mummy with Drawcord Sleeping Bag Liner

Maximum Warmth, Minimum Bulk – Sea to Summit Extreme Reactor Mummy Liner with Drawcord in Red

The Sea to Summit Extreme Reactor Mummy with Drawcord Sleeping Bag Liner is the cold-weather sleep system upgrade for serious campers and backpackers who need every degree of warmth they can get. The mummy shape with integrated drawcord seals in heat around your head and shoulders — eliminating the cold spots that a rectangular liner simply can't address. Crafted from Sea to Summit's Extreme Reactor fabric, this liner adds significant warmth to your existing sleeping bag, effectively pushing its temperature rating into colder territory without the weight and cost of a new bag. The vibrant red colorway is easy to spot in your kit, and the Regular size fits most mummy sleeping bags comfortably.

Size: Regular | Color: Red | Condition: Sample – Brand Sample, Never Sold at Retail | Original Retail: $85.00

Key Features:

• Extreme Reactor Fabric: High-performance liner material that adds significant warmth to your sleep system — a meaningful temperature rating boost for cold-weather camping.
• Mummy Shape with Drawcord: Contoured cut and integrated drawcord seal in heat around your head and shoulders — eliminating cold spots for a warmer, more efficient sleep system.
• Temperature Rating Boost: Adds several degrees of warmth to your existing sleeping bag — extend its usable range into colder conditions without buying a new bag.
• Standalone Use: Works on its own as a sleep layer in warm conditions, huts, hostels, or anywhere you want a clean, comfortable sleep surface.
• Sea to Summit Quality: Trusted by serious campers and backpackers worldwide — built to the standards of a brand that takes sleep systems seriously.

Ideal for the cold-weather camper or backpacker who wants to maximize their sleep system's warmth at a fraction of the retail price. As a brand sample, this liner has never been sold at retail — you're getting a pristine Sea to Summit Extreme Reactor Mummy Liner at nearly 47% off the original $85 price. Sleep warmer, go further, and push your season deeper into the cold.