Down gear offers unbeatable warmth-to-weight performance, but only if it stays dry. Nikwax Down Proof Wash-In is a high-performance, wash-in waterproofer designed to protect the insulation and loft of down-filled jackets, sleeping bags and clothing. It adds Durable Water Repellency (DWR) to both the outer fabric and the down inside, helping your gear resist rain and condensation while maintaining breathability.

Ideal for hydrophobic and regular down, it works best after cleaning with Nikwax Down Wash Direct. Trusted by adventurers, climbers, and outdoor professionals, it’s the final step in keeping your kit adventure-ready.