Part of Hydrapak’s ultra-light series, the Ultraflask Speed 500ml is so light, you might forget you brought it along on your run. Weighing in at a mere 41g, it’s optimal hydration, no matter what kind of runner you are. Its pliable material conforms to most pockets, it shrinks as you drink to minimise water movement and it can be used with or without the tube. Topped with a new feature, the SpeedFill™ cap, makes aid station refills a breeze.

• Comfortable fitSoft material conforms to most hydration vests, belts, or pack pockets.
• CompressibleFlexible design shrinks as you drink reducing water movement.
• Customisable hydrationChoose between a bite valve and a drink tube cap.
• Speedfill capTopped with a flip top cap for fast refills at aid stations.
• Vest-pack fitProvides bounce-free stability and a flexible flask shoulder to prevent chafing so you can focus on FKT's and PR's
• High-flow bite valveAuto-seals after each sip, eliminating annoying drips
• Large standard 42mm openingLets you fill the UltraFlask easily with ice and drink mixes
• CustomiseCap with two options depending on your run or vest, directly mount your bite valve or use the straw cap 100 mm
• ToughMade of ultra-durable, abrasion resistant TPU & RF welded seams for superior durability and elasticity
• 100% BPA & PVC freeWide working temperature range (can be frozen - max temp 60° C)