The SF Bivvi bag is the ideal choice for adventure racers, bushcraft and emergency survival. Specification Weight: Adult - 340g / 12oz Extra Long - 400g / 14oz Packsize: 14cm x 10cm / 6" x 4" Outer Fabric: Paratex Dry Half centre zip for quick and easy access (perfect for use with the Snugpak special forces range of sleeping bags) 100% waterproof fabric with a hydrostatic head of more than 5000mm (items with a hydrostatic head over 1500mm are generally waterproof) Taped & Sealed Seams Tough Breathable (will transmit up to 7.5 litres of moisture per m2 per 24 hours) Soft to the touch Supplied with own stuff sack Outer Fabric treated with a Durable Water Repellent (water repellency can be maintained by a cool tumble dry after washing and periodic retreatment with suitable aftercare products such as Nikwax or Grangers)