Nov 4, 2019



A classic in carry and climate comfort since 1991. The curvature of the pack sack creates a space between the backpack and your back. This ventilation gap allows warm air to escape immediately, as the only contact surface with your back is a large, mesh surface.


  • Optimum Ventilation

  • Efficient heat transport

  • Pressure-free, comfortable fit

ACS Tight

Two soft back pads lie either side of the spine and form the central ventilation channel. The reinforcement plate distributes the weight evenly and protects our sensitive backs from heavy loads.

"ACS Tight"

  • Close-contact, pressure-free fit

  • Optimum freedom of movement

  • Active ventilation