- The one-size-fits-all SKIN PRO 15 SET is a light, stretch, slim fitting, pack for all things outdoor. It has a new strap adjustment for all sizes, that also improves stability. The versatile, stable gear carrying system makes it easy to attach poles, a helmet and ice axes (cause you know we need those in sunny South Africa). It comes with a soft 1.5L bladder, is compatible with two 500ml soft flasks up front and has a max capacity of 20L. So what you waiting for? Adventure awaits!