The 2021-22 Upper Deck NHL Star Rookies Box Set is a factory-sealed 25-card rookie set featuring players from the National Hockey League (NHL). The set includes cards made of card stock, showcasing talented rookies like Alex Newhook, Cole Caufield, and Trevor Zegras. Each box contains cards in standard size, providing collectors with a diverse selection of players from various teams such as the New York Rangers, Washington Capitals, and Colorado Avalanche. This set is a must-have for fans of ice hockey and sports trading cards looking to add promising rookies to their collection.