Alpha Direct Fleece Sleeping Bag Liner

When your sleeping bag isn't quite cutting it in colder temps, the Alpha Direct Fleece Liner is what we pull out first. Polartec Alpha Direct construction breathes and moves with you, adding real warmth without the suffocating feel of a traditional liner. Use it solo in mild conditions or pair it with any bag to push its rating further.

• Polartec Alpha Direct fleece delivers active insulation — warm enough to matter, breathable enough that you won't wake up drenched
• Stretchy, form-fitting cut moves with your body and stays put inside your bag instead of bunching and twisting overnight
• Adds measurable warmth to extend your existing bag into colder conditions without piling on significant weight or bulk
• Works as a standalone light layer on shoulder-season trips or doubles as a genuine warmth upgrade inside any sleeping bag
• Available in Regular and Long lengths in Asphalt — sized to fit a range of body types and bag geometries