Boost your sleep system’s warmth and versatility with the Sea to Summit Reactor Thermolite® Fleece Liner. Designed to add up to 18°C (64.4°F) of warmth, this liner is an excellent companion for cold-weather adventures or as a stand-alone sleeping bag for milder climates.

Made from lightweight, hollow-core Thermolite® fleece, it traps extra air to provide significant insulation without added bulk. The liner features a technical hood with a drawcord closure, a shaped foot box for enhanced comfort, and a one-third length zipper for easy entry and ventilation. Ideal for backpacking, camping, or emergency cold-weather gear, this liner complements your sleep system by extending your sleeping bag’s range by an extra season.

In summer, use the liner on its own to keep sand, dust, and dirt away from your sleeping gear. Maintenance is a breeze—just toss it in the washing machine for quick cleanup. Lightweight, compact, and durable, the Reactor Fleece Liner packs into its own Ultra-Sil™ stuff sack for effortless portability.

Key Features:

• Adds Warmth: Increases your sleeping bag’s warmth by up to 18°C (64.4°F).
• Thermolite® Fleece Material: Hollow-core fibers trap air for lightweight insulation.
• Comfortable Design: Includes a drawcord hood, shaped foot box, and one-third length zipper for ventilation.
• Versatile Use: Works as a sleeping bag liner in winter or a stand-alone sleeping bag in warmer conditions.
• Easy Maintenance: Machine washable and dries quickly.
• Compact & Lightweight: Packs into its Ultra-Sil™ stuff sack for convenient storage and transport.

Specifications:

• Weight: 13.4 oz (379 g)
• Length: 6 ft 7 in (200 cm)
• Pack Size: 8 in x 5 in (20 cm x 13 cm)
• Color: Gray with red trim
• Material: Thermolite® fleece