Introducing the TrainingMask 3.0 Dark Venom Sleeve. THIS. IS. YOUR. WORKOUT! Let the dark side of yourself out to play in your workouts with the all new Dark Venom Sleeve. All TrainingMask 3.0 sleeves feature 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.