The training mask 2. 0 gives you the ability to fully customize your style with dozens of unique sleeves. Simply peel off the original sleeve and replace it with the new sleeve to complete your customized look. Details: training mask 2. 0 allows you to fully customize it to fit your style custom form-fitting sleeve for training mask 2. 0 training mask 2. 0 sold separately performance grade neoprene for maximum durability 100% hand-washable. Training mask 2. 0 sleeve all american - medium 1