1.protect Babys Head.baby Head Protector Helmet Offers Most Ideal Protection For Toddlers During Crawling/playing/standing.it Can Effectively Protect The Baby During The Collision And The Friction Caused By The Bump And Fall. Also Suit For Daily Indoor/outdoor Use.(not Suit For Biking.)2.protect Baby's Knees.baby Knee Pads Protect Baby's Knees From Bruises And Scrapes When They Are Crawling Or Learning To Walk. The Pad With Silicone Anti-slipper Points Makes Your Baby More Stable While Crawling. Three Kinds Of Color Easily Matches Baby's Clothing. 3.age Adjustable.the Baby Protector Helmet For Baby Ages 6 To 36 Months.weighs Just 3oz With Thickness An Inch, Lightweight And Breathable.the Knee Pads Are Unisex And Fits Most Babies, Usual For 6-24 Month Baby.4.cotton Material.the Outer Layer Is Made Of 100% Cotton, The Fill-in Layer Is A High Density And Elastic Sponge Free From Smell. The Baby Safety Helmet Very Comfortable To Wear, Non-toxic, Bpa Free, No Harm For KidsThe Baby Helmet And Knee Pads Are Washable With Water.