Reduces negative behaviors resulting from anxiety, including whining and barking. Real-feel pulsing heartbeat and heat pack mimic being part of a pack, working to ease loneliness, fear, and separation anxiety. Pet is calmed by appealing to natural instincts, not through medication or restraint. Helps dogs transition into their new home and family. Helps dogs sleep through each night. Machine washable on gentle cycle. Size: 15” x 10”.