New in box/ Box has been opened, as shown in photos, socks are new/ never used Two toddler-sized socks: one size 2 (12lbs. to 30lbs), one size 3 (30lbs. to 55lbs.) - DOES NOT INCLUDE THE SMART SOCK SENSOR The NEW toddler-sized fabric sock works with your existing Smart Sock Gen 3 sensor, and Owlet's optimized technology continues to provide peace of mind as your child grows. -Track your toddlers sleep trends. -Access to 42 additional months of live readings. -Tailored monitoring technology as Child grows. -Large fabric sock works with Smart Sock 3 sensor.