Big Agnes Greystone 30 (600 DownTek) Regular

The Big Agnes Greystone 30 is a mummy-style down sleeping bag designed for three-season backpacking and camping, comfortably fitting users up to 183 cm. It strikes a balance between warmth and packability, making it a reliable choice for spring through autumn trips.

Inside, you’ll find 600 Fill DownTek insulation treated with a PFC-free, bluesign-approved water-repellent finish to help maintain loft in damp conditions. The recycled polyester ripstop shell and taffeta lining shed moisture while standing up to rough terrain, and the tapered mummy shape reduces bulk to conserve heat. At just 822 g, it sits in the superlight category and packs down small for easy carry. Comfort ratings of +3 °C for women and –3 °C for men mean you’ll stay cozy as the nights turn chilly.

Fill power refers to how much volume one ounce of down fills, and the 600 Fill rating here offers a solid balance of warmth and compressibility. DownTek adds a thin polymer coating around each cluster, helping the insulation resist moisture and hold its loft even when conditions get damp. Choosing bluesign-approved, PFC-free treatments ensures the materials meet strict environmental and safety standards without sacrificing performance.