Big Agnes Greystone 20°

The Big Agnes Greystone 20° is the lighter member of the Greystone line, mummy-shaped and rated to the newer EN ISO 23537 standard. A comfort rating of -2 °C and limit of -9 °C, combined with a total weight of 1020 g (532 g of fill), work out to 113.3 g per degree — a step behind the heavier Greystone 0° but still a usable figure for three-season backpacking. The fill is the same 600-fill DownTek hydrophobic down with RDS certification. Recycled shell and liner fabrics carry over, along with bluesign and PFC-free status. A two-way YKK zipper and full coupleability with a matching bag make it a practical choice for couples who want to zip two bags into one shared sleeping space on less demanding trips. An insulated collar and draft tube along the zipper are standard. This is a general-purpose spring-to-autumn backpacking bag for users who do not expect deep sub-(-10 °C) cold — for winter conditions the Greystone 0° is the better fit.