Topo Designs Mountain Hydro Sling in black — front view with cross-body strap and bottle pocket
Adjustable removable shoulder strap detail on the Mountain Hydro Sling
Paracord cinch and lock at the top opening of the Mountain Hydro Sling
D-ring and daisy chain attachment points on the Mountain Hydro Sling for clipping gear
Topo Designs Mountain Hydro Sling in black — front view with cross-body strap and bottle pocket
Adjustable removable shoulder strap detail on the Mountain Hydro Sling
Paracord cinch and lock at the top opening of the Mountain Hydro Sling
D-ring and daisy chain attachment points on the Mountain Hydro Sling for clipping gear
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TOPO DESIGNS

Mountain Hydro Sling

44,90 €
/
  • Holds a Bottle up to 950 ml
  • Removable Velcro Loops for the Bike
  • 100% Recycled 200D Nylon
  • WRAP and Fair Wear Certified
  • MAP Guarantee™ Repairs Program
Color
  • 30-day returns
  • 2-year warranty
  • Secure checkout

with Chronopost or on with Colissimo.

Free delivery to pick-up points from €60.

You earn 2,24 € in your pot.

Shipping

Branded backpacks comes from our French warehouse and are shipped with secured express shipping only.

Our orders are shipped within 2 days.

Here are some estimates depending on your country, calculated from recent shipments.

🇫🇷 France: 2 business days
🇪🇺 EU: 3 to 6 business days
🇬🇧 UK: 4 to 5 business days
🇺🇸 🇨🇦 North America: 6-9 business days

Returns

If you do not like your product, you have 30 days after receipt to return it, no questions ask.

📧 Step 1: Contact us at info@eikenshop.com to inform us of your desire to return the product. We'll provide you with all the details needed.

📦 Step 2: Ship the order and waits for us to receive it.

💳 Step 3: Once received and inspected, we will refund your order to the payment method used during your order, you do not have to do anything.

Fair Wear Certified product
Fair Trade Certified product
Mountain Hydro Sling - Black
Mountain Hydro Sling Black44,90 €

Volume1.7 L

Dimensions17 × 10 × 10 cm

BottleUp to 950 ml

CarryCrossbody or on the bike

Topo Designs · Mountain Hydro Sling

A bottle of up to 950 ml, crossbody or strapped to the bike.

Out walking, the Mountain Hydro Sling is a crossbody bottle carrier that hangs at your hip, the bottle inside, your keys in the mesh pocket on the front: you drink without taking anything off. On the bike, you remove the shoulder strap and its hook-and-loop straps fix it to the bike, the bottle within reach. A 1.7-litre carrier in recycled nylon, cinched at the top by a drawcord, for a reusable bottle of up to 950 ml. It carries the water, not the picnic.

City · Cycling · Hiking

The bottle within reach, on you or on the bike.

Man in a blue sweatshirt, the Mountain Hydro Sling worn crossbody at his hip, in brown and blue

Ways to carry

Crossbody at your hip, or fixed to the bike with the shoulder strap taken off.

The Mountain Hydro Sling worn crossbody at the hip of a man in a blue sweatshirt, in brown and blue
CrossbodyThe shoulder strap adjusts: the carrier drops to your hip, and you grab the bottle without taking anything off.
The Mountain Hydro Sling fixed to the front of a bike, a bottle inside, in brown and blue
On the bikeThe shoulder strap comes off; hook-and-loop straps, threaded through the daisy chain on the back, fix it to the bike, the bottle within reach.

Worn

Crossbody at the hip, across the chest, or fixed to the bike.

4 photos

  • In front of a brick wall, a woman in a white cap wears the Mountain Hydro Sling crossbody, a bunch of keys hanging from the ring, in orange and sea green.
  • Fixed to the handlebars of a road bike, the Mountain Hydro Sling open, a hand putting a can inside, in cream, turquoise and olive.
  • A woman in grey dungarees wears the Mountain Hydro Sling crossbody, the carrier against her hip, in midnight blue with a white drawcord.
  • Close-up of the Mountain Hydro Sling against the hip, mesh pocket and Topo label, in midnight blue with a white drawcord.

To scale

Barely taller than a phone standing upright, and a little wider.

16.5 cm tall and 10.2 cm to a side: the 950 ml bottle goes in and sticks out of the top, held by the drawcord.

  • Hydro Sling16.5 × 10.2 × 10.2 cm
  • Phone15 × 7 cm
Hydro SlingPhone

The details

A drawcord at the top, a mesh pocket on the front, a zipped pocket on the back.

Mountain Hydro Sling Black from the front, a bottle inside: mesh pocket and shoulder strap
FrontA mesh pocket cinched by a cord with a cord lock; the shoulder strap adjusts and comes off.
Orange paracord drawcord and mesh pocket of the Mountain Hydro Sling, in khaki, turquoise and olive
The topA paracord drawcord and its cord lock close the carrier over the bottle.
Back of the Mountain Hydro Sling: turquoise daisy chain, in khaki, turquoise and olive
The backA daisy chain and a D-ring to hang small items from, and a zipped pocket.

The Mountain family

One litre for the essentials, or bigger to carry water.

Mountain Waist Pack 1L River Blue / Dark Pine, front view

Mountain Waist Pack 1L

1 L · 14 × 23 × 6 cm

The simple bum bag: two zipped pockets, round your waist or crossbody.

See the Mountain Waist Pack
Mini Quick Pack 1.7L Woodland / Brown Oak, front view

Mini Quick Pack 1.7L

1.7 L · 14 × 24 × 5 cm

Flatter: a slip pocket inside, and a loop for a bike light.

See the Mini Quick Pack
Mountain Hydro Sling Black, front view

Mountain Hydro Sling

1.7 L · 16.5 × 10 × 10 cm

A crossbody bottle carrier: a bottle of up to 950 ml, and a mesh pocket on the front.

This bag

Mountain Hydro Hip Pack River Blue / Brown Oak, front view

Mountain Hydro Hip Pack

4.4 L · 360 g · 17 × 27 × 10 cm

For hiking: two bottle pockets for bottles of up to 650 ml, and a moulded back panel.

See the Mountain Hydro Hip Pack

Photos to the same scale, by the longest dimension: 22.9, 24.1, 16.5 and 26.7 cm.

Topo Designs

A sewing machine in a Fort Collins basement, in 2008.

Since 2008

Jedd Rose buys a sewing machine and sews the first bags in his basement in Fort Collins, Colorado; Mark Hansen asks around for people who can make them.

Tough and simple

The two founders wanted gear like the kit they grew up with: tough, practical, classic, the opposite of throwaway and overcomplicated. The same bag goes from the city to the trail.

Guaranteed, repaired

Topo Designs guarantees its bags against defects in materials and workmanship for a reasonable lifetime, excluding normal wear, accidents and lack of care, and would rather repair than replace. For a bag bought from Eiken, the claim goes through us.

Eiken's take

Why we chose it
A big bottle, a mesh pocket, a zipped pocket and two ways to carry it: water always to hand, without a backpack.
Worth knowing
1.7 litres: the bottle, your keys and phone, little more; for a full day, the Mountain Hydro Hip Pack takes 4.4 litres and two bottles.
Who it's for
For walking or riding with a big bottle, without a backpack or a bottle in your hand: the water on you, and almost nothing else.

Baptiste, Eiken

Specifications

  • Volume1.7 L
  • Dimensions16.5 × 10.2 × 10.2 cm (height × width × depth)
  • Closureparacord drawcord with cord lock at the top
  • Storagecarrier for a reusable bottle of up to 950 ml; mesh pocket on the front, with cord and cord lock; zipped pocket on the back
  • AttachmentsD-ring and daisy chains; on the back, daisy chain and removable hook-and-loop straps for the bike
  • Carryadjustable, removable shoulder strap
  • Fabric100% recycled 200D nylon; 100% recycled 210D nylon lining
  • Made inVietnam, WRAP and Fair Wear certified production
  • Topo Designs guaranteedefects in materials and workmanship, for a reasonable lifetime
  • Topo Designs reference932430 (Black: 932430001)

Specifications and dimensions: Topo Designs data (topodesigns.com and topodesigns.eu, October 2026); dimensions converted from inches.

Returns30 days to change your mind.
Legal guarantee2-year legal guarantee of conformity, on top of the brand's own guarantee.
CareNo washing machine, no tumble dryer, no bleach: a stain comes out with warm soapy water and a soft brush, then rinse with cold water; air dry. After the beach, rinse the zips: salt damages them.

Questions

Which bottle fits in the Mountain Hydro Sling?

A reusable bottle of up to 950 ml, held at the top by a paracord drawcord and its cord lock.

Can I fix it to my bike?

Yes: the shoulder strap comes off, and removable hook-and-loop straps, threaded through the daisy chain on the back, fix it to the bike.

What are the dimensions of the Mountain Hydro Sling?

16.5 × 10.2 × 10.2 cm (height, width, depth), for 1.7 litres.

Is the Mountain Hydro Sling waterproof?

No, it isn't made for rain: in steady rain, water eventually soaks through its recycled nylon fabric. Put your phone in a pouch.

Hydro Sling or Hydro Hip Pack?

The Mountain Hydro Sling, 1.7 litres, carries a bottle of up to 950 ml crossbody or on the bike. The Mountain Hydro Hip Pack, 4.4 litres for 360 g, buckles round your waist with two 650 ml bottles and room for the day.