Naturehike Cicada Wing CW400 Square Down Sleeping Bag (2026)

A lightweight down bag for September and shoulder-season camping in Ontario: 400 g of 650-fill duck down in a square-top, mummy-foot shape, so your shoulders have room and your feet stay warm.

Key facts

• Comfort 6 °C, limit 1 °C, extreme −14.3 °C
• 650FP duck down, 400 g fill
• M: 210 × 75 cm, 0.76 kg, packs 16 × 16 × 35 cm
• L: 220 × 85 cm, 0.89 kg, packs 18 × 18 × 35 cm
• 400T 20D ripstop nylon shell

Why this one

• Half the weight and a third of the bulk of a cotton bag with the same rating: it fits a backpack or a kayak, not just a trunk.
• Square top for side sleepers, mummy foot for warmth.
• Spec for spec it matches down bags that cost far more.

Good to know

Down is not machine-washable: spot-clean and sleep in our stretch liner. Take the L if you are over about 180 cm. For early-October nights pair it with an insulated pad; cold sleepers step up to the Snow Petrel SP550.