Nike Kids' Gym Sack EASY TO PACK, EASY TO CARRY. The Nike Gym Sack is everything you need for practice or play. Pack your gear with a roomy interior and keep it secure with an adjustable drawstring closure. Spacious main compartment provides easy access to your gear. Drawstring closure makes it easy to cinch up and carry on your shoulders. More Details Water-resistant material 18"H x 14"W 100% polyester Spot clean Imported