snug -
enjoying or affording comforting warmth and shelter especially in a small space; "a cozy nook near the fire"; "snug in bed"; "a snug little apartment"
comfy,
comfortable providing or experiencing physical well-being or relief (`comfy' is informal); "comfortable clothes"; "comfortable suburban houses"; "made himself comfortable in an armchair"; "the antihistamine made her feel more comfortable"; "are you comfortable?"; "feeling comfy now?"
snug -
fitting closely but comfortably; "a close fit"