Helps prevent child from climbing out and unattended wandering. Helps protect from unwanted objects and pets entering playard, while containing child's own bottles, toys, etc. Helps prevent child from tipping playard over. Helps prevent injuries from falls. Easy to assemble - no tools needed. Fits all rectangular portable playards 28"x40" to 31"x44". Collapses easily for travel. Safety tested - patented, washable. Ages 0-36 months.