ULTRALITE MUMMY BIVI MSRP: $69.95 Our innovative bivi is made from super tenacious 1.1 oz silicone impregnated ripstop nylon. The waterproof bottom and water repellent, breathable top provide amazingly lightweight protection for your sleeping bag. Measures 72-1/2??â???¥ to... Qty in Cart: 0 Quantity ( in cart): Decrease Quantity: Increase Quantity: Price: MSRP: $69.95 Subtotal: Add to Cart