Axe & sledge - hwmf pre-workout - white cherry hwmf isn't just an acronym. It's a way of life. A hard-working mf'er deserves a pre-workout that can fire them up for any and every training session. That's why we created hwmf, a high-stim pre-workout loaded with 400mg caffeine, hwmf also contains 6 grams of l-citrulline, 2. 5 grams of betaine, 600mg of alpha-gpc, 100mg of cognatiq and more. . Axe & sledge supplements hwmf high stim pre-workout - white cherry (40 servings)