A roomy yet compact training backpack Material: made in part with recycled materials Carry all your things. Because you won't have to worry about making hard choices when you've got this adidas backpack. Thoughtful details like an inside hanging pocket and adjustable straps make all the difference. Mesh in the back keeps the air flowing. Cinch up the side straps to not only secure your stuff but also make it as small as possible. Made with a series of recycled materials, and at least 40% recycled content, this product represents just one of our solutions to help end plastic waste.