The Sierra Water Resistant Sleeping Bag Cover protects your sleeping bag on wet, damp, or frosty nights under the bivvy. The sleeping bag cover is water resistant (1,000mm waterproof rating) and highly breathable (20,000g breathability), the balance you need for a comfy night’s sleep under the stars. Designed to be used with a bivouac and sleeping mat set-up, the sleeping bag cover gives you an extra layer of protection from light rain, dewy conditions, or any moisture build-up around your sleeping area. It’s an excellent backup for sleeping under dripping bivvy rocks, tarp shelters, tenting in heavy rain for multiple nights, or when your primary shelter is compromised. If your sleeping bag gets wet during a multi-day mission, it can ruin the trip and even pose a serious safety risk, especially if there’s no opportunity to dry it out. Unlike many waterproof sleeping bag covers, our cover is highly breathable, so you won’t overheat or wake up in a pool of sweat. Weighing just 210g, the Bushbuck Performance Sleeping Bag Cover provides peace of mind when facing wet conditions. Note: This is a sleeping bag cover, not a bivvy bag. It provides a layer of protection for your sleeping bag and is not designed to replace your primary shelter.