Here's what other sites are saying:
Don't get your ultralight down bag caught out in the rain--tuck it, and you, inside the Rab Storm Bivy and hunker down for a comfortable night's sleep. Hyperlite Storm fabric and fully taped seams ensure you stay dry when monsoon season rears its head. A mesh panel vent lets you get some ventilation to keep condensation down and keep things fresh.
The Rab Storm Bivi is a Lightweight, value for money, waterproof and breathable bivi bag.
A simple, lightweight bivy that will keep you dry when the weather turns nasty. Top quality materials and workmanship.>weight: 495grams/1lb 1oz>watergate 2 layer breathable fabric>side wall maximizes sleeping bag loft>heavy duty 10,000mm nylon waterproof base>storm flap over vented zip>size: 86.5"x31."
- Vargo Outdoors
CLOSEOUTS . Be prepared for whatever nature throws at you on your backcountry adventure with Rab's waterproof breathable and ultralight Storm bivy sack, which protects you and your sleeping bag from harsh conditions. Waterproof breathable Hyperlite Storm fabric with fully taped seams Heavy-duty 5000mm laminated nylon waterproof base Lightweight, packs small Protects from bugs Side walls maximize sleeping bag loft Vented zip with storm flap Stuff sack included 1-person, 3-season Floor: 19 sq.ft. Dimensions (LxW): 86-3_4x31-1_2" Stuff size: 9x4" Weight: 1 lb. 1 oz. Material: Nylon Made in China Visit our Sleeping Bag Guide Available Colors: RED, OLIVE.
- Sierra Trading Post