Designed to fit smaller heads, the MVP1000 can fit head sizes ranging from 6 1/8 through 7 1/4. An adjustable tensioning system provides a secure fit. The Dual Density foam liner is made with firm foam layer for absorbing and dispersing impacts followed by a second softer layer which is moisture wicking, comfortable, and fast drying. New ventilated ABS plastic shell with patented I-Bar Vision. Perfect for T-Ball.