I run about 500 km a month and my marathon best is under 2:30, and I chose these with care. This is my conclusion as of Oct 21, 2026. Choose a pouch by the size of what you carry. These 6 are lined up on the size of the phone and whether a 500 mL bottle fits, using official Japan figures. No. 1 is the GronG Fit-in Pouch (about 120g, JPY 2,980), No. 2 the mont-bell Cross Runner Pouch M (82g, JPY 4,200) and No. 3 the same pouch in S (51g, JPY 3,300).
The Shoe Nerd's top pick
For a running pouch, start with the Fit-in Pouch. It carries a 6.9-inch phone and a 500 mL bottle in one. It's about 120g and JPY 2,980. At about JPY 25 per gram, that's the lowest figure of the six. It cuts one thing from carrying a phone and a bottle separately.
Key points
- To carry a phone and a bottle in 1 pouch, the GronG Fit-in Pouch (about 120g, JPY 2,980). About JPY 25 per gram is the lowest of the 6
- The lightest is the mont-bell Mobile Dry Pouch M (38g); among actual pouches, the Cross Runner Pouch S (51g)
- A 500 mL bottle full of water weighs about 500g. That's about 4 to 6 times the pouch itself (about 4 times for the GronG, about 6 times for the Cross Runner Pouch M)
Choose a pouch by the size of what you carry
The usual mistake with a running pouch is finding out after you buy that the phone doesn't fit or the bottle doesn't fit. Both can be checked beforehand against the official Japan figures.
This article lines up 6 items on three points: phone size, whether a bottle fits, and weight. They are four from mont-bell, one from GronG, and one that clips to a vest strap.
How to choose a running pouch: the criteria I used
| Criteria | Reason |
|---|---|
| 1. The phone size it takes is given in numbers | "Fits large phones" can't be compared. Look at inches or a height × width size |
| 2. Whether a 500 mL bottle fits | Whether you can carry water changes how far you can run |
| 3. Weight and price | Things you wear at the waist bother you less the lighter they are. They wear out, so look at price too |
The 6 running pouches compared
Scroll the table sideways →
| Pouch | Weight | Outer size (height × width) | What fits | Official price |
|---|---|---|---|---|
| GronG Fit-in Pouch | About 120g | — | 6.9-inch phone, 500 mL bottle | JPY 2,980 |
| mont-bell Cross Runner Pouch M | 82g | 11×28cm | 500 mL bottle, water pack | JPY 4,200 |
| mont-bell Cross Runner Pouch S | 51g | 10.5×19.5cm | Wallet, mobile phone | JPY 3,300 |
| mont-bell Waist Bottle Cage | 134g | 17 × 8 cm for a phone | Bottle, phone | JPY 5,200 |
| mont-bell Mobile Dry Pouch M | 38g | 20×14.2cm | Phones up to 16.5 × 8 × 1 cm | JPY 2,530 |
| mont-bell Attachable Phone Pouch M | 52g | 17×9cm | Phones up to 16.5 × 8 × 1 cm | JPY 2,970 |
Image: Rakuten Ichiba
GronG Fit-in Pouch (running pouch)
Lowest price on Rakuten Ichiba: JPY 2,980 (as of 10/20). Prices change daily.
RecommendedSee it on Rakuten IchibaComparing by division: per gram, volume, weight with a bottle
| Pouch | Price per gram | Outer volume | Total with 500 mL |
|---|---|---|---|
| GronG Fit-in Pouch | About JPY 25 | — | about 620g |
| Cross Runner Pouch M | About JPY 51 | about 616cm³ | about 582g |
| Cross Runner Pouch S | About JPY 65 | about 410cm³ | — |
| Waist Bottle Cage | About JPY 39 | — | about 634g |
| Mobile Dry Pouch M | About JPY 67 | — | — |
Going from S to M multiplies the outer volume by about 1.5 (616 ÷ 409.5). It adds 31g (82 − 51) and JPY 900 to the price (4,200 − 3,300). That difference is what you pay for being able to carry a bottle.
The Mobile Dry Pouch M is a waterproof case for a phone. It's not a replacement for the pouch itself.
#1 GronG Fit-in Pouch: phone and bottle in one
Why it wins: it has a main pocket for phones up to 6.9 inches and a bottle holder, at about 120g. It costs JPY 2,980, and its price per gram is the lowest of the 6.
The catch: it's about 38g heavier than the mont-bell Cross Runner Pouch M (82g) (120 − 82). On days you don't carry a bottle, the lighter No. 2 or No. 3 suits you better.
Image: Rakuten Ichiba
GronG Fit-in Pouch (running pouch)
Lowest price on Rakuten Ichiba: JPY 2,980 (as of 10/20). Prices change daily.
RecommendedSee it on Rakuten Ichiba#2 mont-bell Cross Runner Pouch M: 82g, and a bottle fits too
Why it wins: at 82g it's light, and it takes a 500 mL plastic bottle or a water pack. It fits waists up to 99 cm. The pockets are stretch mesh, and mont-bell says the load doesn't bounce around easily.
The catch: if you want to carry a phone, compare your phone's height and width with the outer size of 11 × 28 cm and decide from there.
Image: Rakuten Ichiba
mont-bell Cross Runner Pouch M
Lowest price on Rakuten Ichiba: JPY 5,000 (as of 10/21). Prices change daily.
RecommendedSee it on Rakuten Ichiba#3 mont-bell Cross Runner Pouch S: 51g, for a wallet and a phone
Why it wins: at 51g it's the lightest of the actual pouches, and it costs JPY 3,300. It's sized for a wallet or a mobile phone. It's 1 good choice for short runs of up to 10 km without water.
The catch: the outer size is 10.5 × 19.5 cm, smaller than the M. If you want to carry a bottle, choose the M.
#4 mont-bell Waist Bottle Cage: carrying the bottle at your waist
Why it wins: it has an adjustable holder that takes a bottle, plus a pocket for a phone (17 × 8 cm). It fits waists up to 105 cm.
The catch: 134g is the heaviest of the six, and JPY 5,200 is the highest price. Next to the Pouch M, it's 52g heavier (134 − 82) and JPY 1,000 more (5,200 − 4,200).
#5 mont-bell Mobile Dry Pouch M: protection from rain and sweat
Why it wins: at 38g, it's rated IPX8 for waterproofing. mont-bell says the contents stay dry even when the closed pouch is held 10 meters underwater for an hour. You can operate the phone inside.
The catch: this is a case for a phone, not a pouch. You use it inside another pouch, at an extra JPY 2,530.
Image: Rakuten Ichiba
mont-bell Mobile Dry Pouch M
Lowest price on Rakuten Ichiba: JPY 3,200 (as of 10/21). Prices change daily.
RecommendedSee it on Rakuten Ichiba#6 mont-bell Attachable Phone Pouch M: clip it to the vest strap
Why it wins: it clips onto a belt or similar and holds a phone (up to 16.5 × 8 × 1 cm) in a 52g pouch. It fits shoulder harnesses about 50–70 mm wide.
The catch: it's not something you wrap around your waist. You use it with a vest or a pack. For how to choose a vest, see the running vest guide.
Image: Rakuten Ichiba
mont-bell Attachable Phone Pouch M
Lowest price on Rakuten Ichiba: JPY 3,700 (as of 10/21). Prices change daily.
RecommendedSee it on Rakuten IchibaCombining pouches: Pouch M + Dry Pouch M versus the GronG
| Combination | Calculation | Total weight | Total price |
|---|---|---|---|
| Cross Runner Pouch M + Mobile Dry Pouch M | 82 + 38, 4,200 + 2,530 | 120g | JPY 6,730 |
| GronG Fit-in Pouch | — | About 120g | JPY 2,980 |
| Cross Runner Pouch S + Mobile Dry Pouch M | 51 + 38, 3,300 + 2,530 | 89g | JPY 5,830 |
Even at the same weight of about 120g, adding the waterproof dry pouch changes the price by JPY 3,750 (6,730 − 2,980). Whether you want to protect your phone in the rain is what that difference pays for.
The 6 pouches at a glance: which one for whom
| If you are | This pouch |
|---|---|
| A phone and a bottle in one, cheaply | GronG Fit-in Pouch |
| Light, and a bottle fits too | mont-bell Cross Runner Pouch M |
| No water, and the lightest | mont-bell Cross Runner Pouch S |
| A bottle and a phone in fixed places | mont-bell Waist Bottle Cage |
| You don't want your phone to get wet, even in the rain | mont-bell Mobile Dry Pouch M |
| You want to put the phone on the vest strap | mont-bell Attachable Phone Pouch M |
Who is it for?
- Good fit: people who run with a map or music on their phone. People who want to carry what doesn't fit in their pockets without holding it.
If you run with music, take a look at the running earphones guide too. If you carry a lot of water and food over long distances, a vest suits you better than a pouch. If you run in the mountains, read what a trail running beginner needs first.
Price and where to buy
| Pouch | Official price | Rakuten price range |
|---|---|---|
| GronG Fit-in Pouch | JPY 2,980 | JPY 2,980 |
| Cross Runner Pouch M | JPY 4,200 | JPY 5,000 |
| Cross Runner Pouch S | JPY 3,300 | — |
| Waist Bottle Cage | JPY 5,200 | — |
| Mobile Dry Pouch M | JPY 2,530 | JPY 3,200 |
| Attachable Phone Pouch M | JPY 2,970 | JPY 3,700 |
mont-bell offers S and M sizes. Check the "S" or "M" at the end of the product name before you buy.
FAQ
Does a phone fit in a running pouch? Up to how many inches?
The GronG Fit-in Pouch takes phones up to 6.9 inches. The mont-bell Mobile Dry Pouch M and Attachable Phone Pouch M take phones up to 16.5 × 8 × 1 cm (height × width × thickness). The L waterproof pouch takes up to 17.5 × 9 × 1 cm.
Does a 500 mL plastic bottle fit in a running pouch?
The GronG Fit-in Pouch holds a 500 mL bottle. The mont-bell Cross Runner Pouch M also takes a 500 mL plastic bottle (it may not fit, depending on the bottle's shape). The S is sized for a wallet or mobile phone. If you want to carry a bottle, choose the M.
Does a running pouch get wet in the rain?
The Cross Runner Pouch is made of mesh and isn't waterproof. To protect your phone, put the IPX8-rated Mobile Dry Pouch M inside it.
What waist size do running pouches fit?
The mont-bell Cross Runner Pouch S and M fit waists up to 99 cm, and the Waist Bottle Cage up to 105 cm.
