This waist pack is specifically designed for women. I have used the pack a few times but have had the pack for several years. It is great for running, walking and hiking. It's ergonomic design wraps snugly around the hips; it provides light hydration; the body of the pack is a breathable air mesh that dries quickly and keeps you cool; the main compartment holds an angled BPA free 21 oz. specialized water bottle; webbing hip belt has 2 streachy mesh pockets perfect for keys and snacks; waist and hip fit 25"-36".