Hydrapak Ultraflask Speed Flask PFDs and a dark fabric under

and a dark fabric under brim that helps reduce glare

-Multi-function internal padded sleeve fits a 15" laptop or a reservoir

Flat bottom allows the chalk bag to stand upright

Highly efficient and lightweight Prusik pulley

but it features our Straitjacket insert to keep the bottom biner in the optimal clipping position

Hydrapak Ultraflask Speed Flask PFDs and a dark fabric underGo big. The largest of our ultra light series, the UltraFlask Speed 600 ml holds more so you can go the distance. Its soft material allows it to fit snugly in most vest pockets and it shrinks as you drink to minimize water movement. Topped with our newest SpeedFill cap feature that makes aid station refills a breeze. COMFORTABLE FIT Soft material conforms to most hydration vests, belts, or pack pockets COMPRESSIBLE Flexible design shrinks as you drink