• Holds: 1 x Drink Mix 160 or 1 x Drink Mix 320
• Push-pull valve for easy and clean liquid transport
• Neck opening: 42 mm
• 3D-welded seams for added stability
• Fits in the chest pockets of most trail running vests
• BPA and PVC free
• Can be frozen if needed
• Made by HydraPak

The Maurten Soft Flask 550 is specifically designed for the use of sports drinks. We find the additional 50 ml capacity particularly practical as it makes dissolving your Drink Mix easier. Perfect for staying well-fueled and hydrated on the go.