Sleeping bag

Abstract

A sleeping bag ( 10 ) includes baffles ( 20 ) cut according to a curved pattern in order to enhance the loft of the canopy of the sleeping bag, thereby improving the thermal performance of the sleeping bag.

1 . A sleeping bag having a longitudinal axis, an upper canopy portion, and a lower floor portion, the sleeping bag comprising an inner skin and an outer skin, insulating material being located intermediate the inner and outer skins of at least the canopy portion, transverse baffles extending between the inner and outer skins of the canopy portion for inhibiting migration of the insulating material in the canopy portion, characterised in that the transverse baffles are cut from fabric according to a curved pattern. 
   
   
       2 . A sleeping bag as claimed in  claim 1 , wherein the curved pattern is a radial arc. 
   
   
       3 . A sleeping bag as claimed in  claim 2 , wherein the width of the curved pattern varies along its length. 
   
   
       4 . A sleeping bag as claimed in  claim 1 , wherein the curved pattern is substantially U-shaped. 
   
   
       5 . A sleeping bag as claimed in  claim 4 , wherein the width of the curved pattern varies along its length. 
   
   
       6 . A sleeping bag as claimed in  claim 1 , wherein the curved pattern includes multiple straight sections, with each section being angularly offset with respect to a neighbouring straight section. 
   
   
       7 . A sleeping bag as claimed in any one of  claims 2  to  6 , wherein the sleeping bag includes transverse baffles in the floor portion, and where the transverse baffles in the floor portion are shorter than the corresponding baffles in the canopy portion.