N'Ice Caps Little Girls and Baby Soft Sherpa Lined Micro Fleece Pilot Hat and Mitten Set Soft sherpa lining in hat and mitten Micro fleece shell; soft sherpa lining hook and loop chin strap and hanging tassle on hat Elastic on mitten wrist For infant sizes up to 18 months the mittens do not have thumbs; larger size mittens have thumbs 1-3 months 3-6 months 6-18 months 2-3 years 4-7 years Double the warmth Double the wind protection Naturally water resistant, and stays warm even if the outer layer gets a little wet Hook and loop chin strap is easy to apply and works well to keep the hat on when playing outside, or bundled up in a stroller A little bit of elastic at the wrist helps to keep these mittens from wiggling off