From Alaskan expeditions to alpine missions in the Cascades and stints on the Appalachian Trail, our Lamina(TM) sets the bar for synthetic bags. Lightweight Thermal.Q(TM) insulation was made for nights out in damp climates or wet conditions. And paired with our innovative offset welded construction, it&';s a game-changer in eliminating those cold spots your old sleeping bag always had. Features: Thermal.Q(TM) synthetic insulation Lightweight 30D nylon ripstop shell fabric with DWR finish Proprietary welded Lamina(TM) construction enhances loft and eliminates cold spots Standard mummy cut with tailored hood, ergonomic draft collar, and contoured footbox Shaped draft collar blocks the escape of warm air Contoured footbox follows natural foot position for maximum warmth and comfort Lightweight, anti-snag, two-way #5 side zipper with glow-in-the-dark, reflective zipper pull Left hand and right-hand zippers available for zip-together functionality Nylon compression sack and mesh storage bag included Durable water-repellent finish Left hand and right hand zippers available for zip-together functionality Two-way zipper allows for easy ventilation Imported Style# 1857421 / 1857422 / 1857423 / 1857424