Material：75% cotton , 22% Polyester（including Elastic fibers and Polyester fiber）and 3% spandex

• 3 pairs come with 3 different colors, which can match kinds of baby clothing
• Keep infant toddler warm when crawling in the AC room.
• Well protect baby's knee from injury like bump or collision when walking.

3 pairs come with 3 different colors, which can match kinds of baby clothing