Equinox Ultralite Mummy Bivi Sack

Product Description

The Equinox Ultralite Mummy Bivi Sack is an ultralight, minimalist shelter accessory designed to provide weather-resistant protection for adventurers who want lightweight gear without sacrificing function. Made from super-tenacious 1.1 oz silicone-impregnated ripstop nylon, it features a waterproof bottom layer and a water-repellent, breathable top that shields you and your sleeping bag from moisture, rain, dew, and wind while helping reduce condensation and weight. Its mummy shape with a mid-length zipper makes it easy to enter and exit, and the bivy packs down small and light — perfect for backpacking, bikepacking, thru-hikes, or minimalist camping where every ounce counts.

Key Features

• Ultralight Construction: Made from 1.1 oz silicone-impregnated ripstop nylon for maximum durability at minimal weight.

• Waterproof & Breathable: Tough waterproof bottom plus a water-repellent top that breathes to help minimize interior moisture.

• Mummy Style: Snug mummy shape fits close around your sleeping bag — great for warmth retention and packability.

• Mid-Length YKK Zipper: Provides easy access and ventilation control.

• Compact & Packable: Rolls up very small to fit in backpacks or travel kits.

• Lightweight Shelter Upgrade: Ideal complement to lightweight tents or used solo under tarps or open skies.

Specifications

• Brand: Equinox

• Model / Type: Ultralite Mummy Bivi Sack

• Material

  1.1 oz silicone-impregnated ripstop nylon

• Shape: Mummy bivy

• Zipper: Mid-length YKK

• Weight: ~0.35 lb (~6.6 oz / ~188 g)

• Pack Size: ~7.5″ × 3″ × 2″ (compact mesh bag)

• Use Cases: Backpacking, hiking, bikepacking, minimalist camping, emergency shelter

• Made In: USA (commonly noted on product listings)