Personalized Under Arm Hair Grey Toddler Sweatshirt. Under Arm Hair, we've all got it. You don't have to work out to be a part of this club! Yea baby! Keep your little one cozy and stylish with this soft and durable toddler sweatshirt. Designed for comfort and ease of movement, it features a classic fit with ribbed cuffs and hem for added warmth. Perfect for everyday wear, playtime, or chilly outings, this sweatshirt is made to withstand the adventures of an active toddler