Lafuma GR20 Sleeping Bag 100% Polyamide Imported Synthetic fibers filling with J6D Maxi loft fiber 150g/m2 x2 on top and J6D Maxi loft fiber 100g/m2 x2 on bottom 40 D polyamide 284T diamond ripstop, water repellent outer envelope 40 D polyamide 268T ripstop lining 3 lbs 9 oz 20 Degree Farenheit Bag