Head has worked with Alexander “Sascha” Zverev, the German tennis player and brand ambassador who is also an environmentally conscious athlete, on the development of Head’s first tennis bags made from recycled PET bottles. The collaborative collection comprises the Gravity R-Pet Duffle Bag and Gravity R-Pet Sport Bag. While 47 PET bottles are needed to make the Gravity R-Pet Duffle Bag, 36 PET bottles are recycled for the slightly smaller Gravity R-PET Sport Bag. The Gravity R-Pet Duffle Bag can store up to 12 racquets while the smaller model can store up to 6 of them. The hangtag in both models is made from recycled paper, and is attached to the bag with a cotton cord instead of a plastic cord. Each bag contains a label with an inspiring message from Zverev that reads: “We should all take greater care of the planet. It was here long before we arrived and we need to be more respectful of its resources to ensure the long-term prosperity of everyone who inhabits our world.” The new collection will be available for purchase starting Feb. 4.