A lightweight expansion baffle providing greater internal space to Mountain Equipment Helium down sleeping bags.FeaturesExpands any Helium sleeping bag by 13 cm / 5 inch width2 YKK® zips allow baffle to zip into existing sleeping bag100% recycled HELIUM™ 20 outer shell is very light and highly breathable with PFC free DWR100% recycled Supersoft 20D lining with PFC free DWR30g of 90-10 Pure Duck Down with a minimum fill power of 700Supplied with lightweight stuff-sackPlease note: Not compatible with the Helium Solo. Can be used on other Mountain Equipment Sleeping Bags with 140cm zips. Mountain Equipment Helium Sleeping Bag Expansion Baffle