The Sierra Designs Nitro 20 Degree Sleeping Bag is a down bag for backpacking. Sleep in comfort on nights down to 20°F with the fluffy softness of 800 fill power Dridown surrounding you. The Dridown is treated to resist moisture, so it can still keep you warm even when tent condensation and unexpected elements try to thwart it. A 15d nylon ripstop shell and lining fabric is soft, durable and lightweight to comfort you and protect the down inside. Snuggle into the draft-dodger collar and catch some z's. Read More dojo.addOnLoad(function() {if(typeof(shoppingListJSPDP) == 'undefined' || shoppingListJSPDP == null || !shoppingListJSPDP) { shoppingListJSPDP = new ShoppingListJS({storeId: '10208',catalogId: '10000001',langId: '-1'}, {id: '3734348', name: 'Sierra Designs Nitro 20 Degree Sleeping Bag', image: '//s7d1.scene7.com/is/image/MoosejawMB/10368638x1167098_zm?$product1000$', type: 'ProductBean', components: {}, skus: [{id: '3734439', attributes: {'COLOR': 'Red / Yellow / Peat','SIZE': 'Regular','ESTIMATED_SHIP_DAYS': '0','Size': 'MEDIUM','Color': 'RED'}},{id: '3735849', attributes: {'COLOR': 'Red / Yellow / Peat','ESTIMATED_SHIP_DAYS': '0','SIZE': 'Long','Size': 'LARGE','Color': 'RED'}}]}, {}, 'shoppingListJSPDP');}}); dojo.addOnLoad(function() {if(typeof(shoppingListJSPDP) == 'undefined' || shoppingListJSPDP == null || !shoppingListJSPDP) { shoppingListJSPDP = new ShoppingListJS({storeId: '10208',catalogId: '10000001',langId: '-1'}, {id: '3734348', name: 'Sierra Designs Nitro 20 Degree Sleeping Bag', image: '//s7d1.scene7.com/is/image/MoosejawMB/10368638x1167098_zm?$product1000$', type: 'ProductBean', components: {}, skus: [{id: '3734