Tailwind Nutrition clear soft flask water bottle with black logo on white background
Three Tailwind Nutrition soft water bottles with black caps, arranged horizontally on white background
Tailwind Nutrition clear soft flask water bottle with black logo on white background
Three Tailwind Nutrition soft water bottles with black caps, arranged horizontally on white background

Tailwind Soft Flask 500ml Slim

Tailwind Nutrition
Price
Regular price £16.95
Regular price Sale price £16.95
Save £-16.95
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Pairs well with

Product data

Know exactly what you are using

Source-checked values from the current manufacturer information.

Not applicable — this is a reusable accessory, not food or drink.official serving

500ml capacity + 38g empty weightprimary metric

1 × 500ml slim flaskRSG pack formats

Best for

Narrower running-vest or shorts pockets where a longer, slimmer 500ml profile fits better.

Activity fit

  • Running
  • Triathlon
  • Hiking
  • Ultra endurance
Nutrition and active quantities
Not applicable — this is a reusable accessory, not food or drink.
Ingredients
Not applicable — this is a reusable accessory, not food or drink.
Dietary suitability and allergens
  • Not applicable — non-food accessory

Not a food or drink. If you have a material sensitivity, check the item and packaging before use.

Preparation and directions
Wash before first use, rinse after each use and dry fully with the cap open.
Training and event use

Training: Test the fit in your exact vest or pocket and practise drinking, refilling and cleaning it.

Event use: Use for a rehearsed fluid or fuel mix and confirm the slim profile remains secure when full and partly empty.

Certification and testing
Not applicable — equipment accessory.
Cautions and individual suitability
Inspect before use, follow the supplied care instructions and replace the item if it becomes damaged.

Source: official manufacturer product page, checked 28 August 2026. Always check the current pack before use.

Description

 Hydrapak UltraFlask™

Hydrapak’s UltraFlasks™ are crafted to perfectly conform to your body, compressing as you drink to minimize sloshing, bouncing, and spillage. This ensures you get every drop of that Tailwind goodness without hassle.

These flexible soft flasks integrate seamlessly with your current gear, fitting well with Ultimate Direction, Salomon, and Nathan vests.

Features:

  • Transparent: Know precisely how much Tailwind you have left.
  • Collapsible: Ideal for multi-stage or international events, shrinking as you use it.
  • Lightweight: At just 38g when empty, it’s incredibly light.
  • Pliable: Conforms to any shape – hand, belt, or vest – making it more comfortable than rigid bottles.

With a 500ml capacity, they’re perfect for runners using vests with two flask pockets. Fill one with Tailwind for an hour’s energy and the other with water, and you’re ready to go! This is the slim version, as some vests have longer and narrower openings for the flasks. Also, some ultra shorts have deep, slim bottle pockets, designed to fit perfectly with these soft flasks.

To view the full Tailwind range, click here.
Shipping information

UK delivery

Royal Mail Tracked 48 is £3.89 for orders under £35 and free from £35.

Royal Mail Tracked 24 is £5.79 below £35, £4.49 from £35 to £54.99, and £3.49 from £55.

Delivery options and final charges are confirmed at checkout. Read our Shipping Policy.
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