The Sea to Summit Thermolite Reactor liner stands out as the lightest thermal sleeping bag liner, providing warmth for cold weather. Utilizing hollow core fibers, it offers outstanding insulation while remaining supper soft, stretchy, and comfortable. Has a mummy shape, footbox, and drawcord hood, making it Compacted and lighter weight than fleece.

The Sea to Summit Thermolite Reactor Liner Features:

• Added warmth: Up to 14F/8C
• Ultralight stuff sack
• Thermolite Polyester fabric
• Technical mummy-shape with drawstring hood
• Lighter weight and more packable compared to a fleece
• WEIGHT: 8.7 oz | 248 g
• LENGTH: 6 ft 10 in | 208 cm
• PACKED SIZE: 5.75 x 4 in | 15 x 11 cm