Introducing the ALL NEW Best Sellers 3.0 Insane Sleeve. The wait is over. 'Of Course' you are going to embrace the darkness and give your TrainingMask 3.0 the look everyone is talking about with the 3.0 Insane Sleeve. The new best sellers 3.0 sleeve series also features the newly upgraded reinforced CryoTech Mesh. But we didnt stop there - We reintroduced the classic cut sleeve form factor you have grown to love from the TrainingMask 2.0. The all new 3.0 sleeve is lighter, breathable, and moisture wicking.