Personalized Shamrock Bicycle Toddler Full Zip Hooded Jacket. A bicycle against an image of a shamrock is a unique Irish gift design for bicyclists on birthdays and St. Patrick's Day. 7.5 oz., 60/40 cotton/polyester. Jersey-lined double-needle hemmed hood. Pouch pockets for all their treasures. Coverstitched shoulders and armholes. Coverstitched rib waistband and cuffs.