Insulated with RDS-certified, 850+ fillpower goose down with a non-PFAS Ultra-Dry Down treatment, the Ember quilt was designed for multi-season use with an excellent warmth to weight ratio. In warmer conditions, the ability to easily ventilate keeps you comfortable. As temperatures drop, the drawcord footbox helps you retain warmth and the light, breathable 10D shell fabric is treated with a non-PFAS DWR finish to repel moisture, while the 10D liner fabric is there to deliver pure comfort. The Ember is easy to secure to your sleeping mat with the attached straps or add it to your Sea to Summit sleeping bag using the integrated QuiltLock system for a thermal boost in colder weather. Features RDS-certified, 850+ fillpower goose down with a non-PFAS Ultra-Dry Down treatment to stay drier in damp conditions Includes a recycled 10D nylon shell with a non-PFAS DWR finish and a 10D nylon liner for pure comfort QuiltLock system and drawcord footbox means the Ember can be secured to a Sea to Summit sleeping bag for additional warmth in colder weather Versatile and functional with adjustable/removable straps allowing you to securely attach the Ember to your sleeping bag or sleeping mat Sea to Summit Guarantee is offered for the Lifetime of this product