In the Hashkiveinu, we ask for comfort and shelter during the night, restful and restorative sleep and for the gift of waking up to a new day. We think of the Divine's love spreading over us like a canopy or a warm blanket. 

This song takes one line of the Hashkiveinu prayer and turns it into song:
U'fros aleinu sukkat shlomekha. Spread over us your shelter of peace.

Service Section: Barchu & Shema 
Source: Under The Wings Of Rafa'el: Blessings, Songs, And Explorations For A Healing Path by Sharon Bernstein