conserving heat and promoting comfort when the device is worn out of bed openings for ventilation may be provided as desired the cover 40 may be held in position by rubber band like members 42 or the cover may be simply secured in position by means of tape string or cord fig5 illustrates an embodiment of foot warming device 44 having a plurality of parallel sections of tubing 46 which may be closed by plugs 48 to contain liquid 50 therein each section of tubing 46 is illustrated disposed on platform 52 which is similar to the sole piece attachment 29 and which may also have a surface layer of a heat reflective material 54 securing bands 56 having snap fasteners 58 may be secured as desired to platform 52 to provide a means for retaining the foot warming device to the foot of a user bands 60 represent metal foil such as aluminum laminated to an insulating layer such as wool cloth or felt disposed to conduct heat from the tubes to upper parts of the foot elastic bands 56 and 62 with snap fasteners 58 and 64 provide means for adjusting the bands for snug fit thus enhancing heat transfer fig6 illustrates another embodiment of the foot warming device 66 of the present invention in addition to having parallely disposed sections of tubing 68 with plug members 70 disposed to contain liquids 72 the foot warming device further includes arcuate tubings 74 which.