Equinox Sprawler Ultralight Silicone Nylon Bivi Bivy Sack Regular UBG160

Protect your sleeping bag from moisture without the weight of a tent — 1.1oz silnylon bivy.

The Equinox Sprawler Bivy Sack wraps your mummy sleeping bag in a waterproof bottom layer and breathable, water-repellent top layer of 1.1oz silicone-impregnated ripstop nylon. A mid-length YKK zipper gives easy entry and exit, and the whole thing packs into a mesh bag smaller than a water bottle.

Key specs:

• SKU: UBG160
• Color: Green
• Material: 1.1 oz silicone-impregnated ripstop nylon
• Bottom: Waterproof
• Top: Water-repellent and breathable
• Zipper: Mid-length YKK
• Closure: Microcord drawstring with cord lock
• Fits: Mummy-shaped sleeping bags
• Includes mesh storage bag with cord lock

Why it works:

Ground moisture, condensation, and light rain can soak a sleeping bag from the outside in. The Sprawler's waterproof bottom blocks ground moisture while the breathable top lets body vapor escape — keeping your bag dry without trapping sweat. Ultralight enough to add to any kit as insurance against wet conditions.

Ideal for: Ultralight backpackers, thru-hikers, tarp campers, and anyone who wants sleeping bag protection without the weight of a tent.