Naturehike Cicada Wing CW400 Square Down Sleeping Bag (2026)

A person of average build, in base layers, on an insulated pad, sleeps through the night without feeling cold at 6 °C. The limit (1 °C) is where you can still sleep curled up. The extreme figure (−14.3 °C) is a survival number, not a buying guide.

For early-October nights in southern Ontario, pair it with an insulated pad and the CW400 covers most people. Cold sleeper? Step up to the Snow Petrel SP550 or add a liner.

Room to move your shoulders and arms, warmth trapped around your feet. It is the shape for people who find mummy bags claustrophobic but still want a bag that packs small.

Not in a normal cycle. Spot-clean the shell; for a full wash use down detergent on gentle and tumble dry low with tennis balls. A liner keeps the inside clean between washes.

L is 220 × 85 cm. M (210 × 75 cm) suits people up to about 180 cm.

A cotton bag with the same comfort rating weighs about twice as much and packs three times bigger. The CW400 is 0.76 kg in M and packs to Ø18 × 35 cm, so it goes in a backpack or a kayak, not just a trunk. What you give up is machine washing.