--- product_id: 73095773 title: "Nathan NS4913 Vaporkrar Running Fitness Waist Pack with Soft 18oz Flask" brand: "nathan" price: "$3.46" currency: USD in_stock: false reviews_count: 8 url: https://www.desertcart.us/products/73095773-nathan-ns4913-vaporkrar-running-fitness-waist-pack-with-soft-18oz store_origin: US region: United States of America --- # 18oz soft flask Fits iPhone 7+ Super-lightweight Nathan NS4913 Vaporkrar Running Fitness Waist Pack with Soft 18oz Flask **Brand:** nathan **Price:** $3.46 **Availability:** ❌ Out of Stock ## Summary > 🏃‍♀️ Run Light, Run Right! ## Quick Answers - **What is this?** Nathan NS4913 Vaporkrar Running Fitness Waist Pack with Soft 18oz Flask by nathan - **How much does it cost?** $3.46 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/73095773-nathan-ns4913-vaporkrar-running-fitness-waist-pack-with-soft-18oz) ## Best For - nathan enthusiasts ## Why This Product - Trusted nathan brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smartphone Ready:** Easily store your iPhone 7 Plus in the zip pocket. - • **Hydration on the Go:** Stay refreshed with the included 18oz soft flask. - • **Designed for Movement:** Step-through design ensures ultimate comfort. - • **Secure Fit Guaranteed:** Top perimeter elastic with gripper keeps it snug. - • **Comfort Meets Functionality:** Experience a bounce-free run with our minimalist design. ## Overview The Nathan NS4913 Vaporkrar Running Fitness Waist Pack is a minimalist, super-lightweight solution for runners. It features an 18oz soft flask for hydration, a zip pocket that accommodates smartphones up to iPhone 7 Plus, and a secure fit with a step-through design and top perimeter elastic. Perfect for those who value comfort and functionality while on the move. ## Description Renowned minimalist ultra runner, Rob kramer, doesn't like to wear anything around his waist. So he helped us develop a waist pak that even he loves to wear. Comfort and high-performance merge with this super lightweight, form-fitting waist pak that features our new 10oz soft flask. ## Features - Minimalist waist pak with 18oz soft Flask - Super-lightweight, bounce-free, and sized for comfort - Zip pocket fits Smartphones sized up to iPhone 7 plus - Step-through design fits comfortable around your waist - Top perimeter elastic with gripper ensures a secure fit ## Images ![Nathan NS4913 Vaporkrar Running Fitness Waist Pack with Soft 18oz Flask - Image 1](https://m.media-amazon.com/images/I/81Ast3u4glL.jpg) ![Nathan NS4913 Vaporkrar Running Fitness Waist Pack with Soft 18oz Flask - Image 2](https://m.media-amazon.com/images/I/81abe9hjL5L.jpg) ![Nathan NS4913 Vaporkrar Running Fitness Waist Pack with Soft 18oz Flask - Image 3](https://m.media-amazon.com/images/I/91qXDZwzdcL.jpg) ![Nathan NS4913 Vaporkrar Running Fitness Waist Pack with Soft 18oz Flask - Image 4](https://m.media-amazon.com/images/I/71Vmu-PereL.jpg) ![Nathan NS4913 Vaporkrar Running Fitness Waist Pack with Soft 18oz Flask - Image 5](https://m.media-amazon.com/images/I/7159zgaIxKL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐ Great belt! It has a flaw, but it's not going to stop me from using it any time soon *by A***X on Reviewed in the United States 🇺🇸 on February 11, 2018* Definite pros and cons to this belt, though overall I am a big fan and it has made my long runs better. With a statement such as that, I wish I could give it five stars, but I can't.Pros:It allows me to carry everything I need for a long run in a wonderfully unobstructive way. My Galaxy S8, gels, baggie for empty gel packs, park pass/ID if need be, and 18 ounces of water are far less of a burden than they ever have been before.I’ve used more standard waist packs with water bottles and they’ve always bounced and I’ve struggled to get them to fit properly. I’ve had zero issues with this belt in that regard. It’s VERY easy to adjust the fit on the fly. If you completely fill the water bottle, there will be a slight bounce (in my experience), though it hasn’t bothered me at all. Plus, as you drink water, the bounce becomes less and less. The fact that the bottle is a soft flask and the size/shape changes as you drink, probably helps (less round=more able to contour to your body’s shape).Given the previous reviews, it seems there were issues with the water bottle in the past. I can report that I haven't had any real issues with it. Occasionally it takes two tries to get the cap properly threaded. I test it before heading out by giving the bottle a squeeze over the sink. I've been running with this for about six weeks now and haven't gotten leaked on yet (which is appreciated since it's cold out at the moment!). I also really like the design of the bottle. It's nice to have it get smaller as you drink from it. Plus, I'm a big fan of the bite cap.Con:There’s really just one and that’s the ability to get the bottle back into the belt after drinking. It really drives me crazy. It’ll often take me about a solid minute of standing on the side of the road, trying to “see with my hands” where exactly to slide the bottle back into, find the Velcro, and ensure that the top and the bottom of the flask are properly inside before starting back up. There are no quick and casual sips of water with this belt. It’s a commitment.Most of the difficulty is in determining *where* the opening is of the belt. I spend a lot of time thinking I’m opening it, when I’m actually reaching too far and am essentially trying to put the bottle between my back and the belt itself!This issue is made worse by the cold weather because I’ve found it’s basically impossible to get the bottle back in with gloves on. Or will it be worse in warm weather when one needs water more frequently??Conclusion/TLDR:Do you want minimalism and the ability to carry plenty of stuff without feeling like you are and are willing to sacrifice a little time on your run with water stops? I completely recommend this belt then! I’d think twice about it if the idea of 60 second water stops isn’t for you.Feedback to the manufacturer:Nathan, if you are reading this, you’re onto something here! This belt is fantastic overall and I’m sure with a little additional R&D you’ll be able to find a way to make it easier to find the opening of the belt. I’m completely sympathetic to the fact that much of what makes the belt so good is in fact what leads to the issue of getting the bottle back in. If you can come up with a way to guide the user’s hand into the water pouch, and release the 2.0 version of this, I’ll buy it in a heartbeat. ### ⭐⭐⭐⭐⭐ Awesome Belt! *by I***R on Reviewed in the United States 🇺🇸 on August 13, 2018* i love this belt! if you are a minimalist you will love this belt! living here in houston, running without a shirt is a must in the summer time! but i need a belt to carry my fuels, salt and electrolytes and i need something that will stay fixed in place! i have many belts and vests for just about all kind of distances....and i have to say this belt just fulfilled a need that i have been missing! i ordered this belt today....it came today...way to go amazon! i took it out for a 12 mile run. this belt is going to get used! i had an iphone in the front pocket along with my house key. i had a couple of gels on the right pocket; it can probably fit 6 gels if you stretched the pocket. in the left pocket i had my salt tablets and electrolytes tablets......there was plenty of room left over for other items. there is no fear of anything falling out of these pockets as i had cinched the belt down pretty tight. i replaced the bottle with an ultimate direction handheld, which i know defeats the purpose...i am used to holding a 20oz bottle in my hand. the pocket in the back can be used to fit a water bottle or foods or gloves or a light weight jacket or a flashlight.....it can hold a lot of stuff! now what is great about this pack is that you can cinched it down to fit your waist. i found that it did not move throughout the run.....a BIG positive in my opinion. i have been looking for a belt like this forever! it literally disappeared on my waist and i can just focus on running. now if you intend to use the pouch in the back to store a collapsible water bottle i can see it being a challenge when the water container is full. i think one of the reviews below talked about it being difficult to put back in after drawing a drink from it....i think he may be right. but since i carry my bottle in my hand i dont see that as a problem. having said that....what keeps you from bringing that to the front and the phone pocket to the back? anyway....really nice belt. it meets my needs for carrying all of my supplies for a self supported run probably up to a 50k. longer than that i will supplement this belt with a vest. i love the material that this belt is made out of. it is stretchable and seems to be very well made. nice job Nathan! awesome belt! ### ⭐⭐⭐⭐⭐ Small waisted female rejoice! *by L***N on Reviewed in the United States 🇺🇸 on September 3, 2020* After many years using the flip belt, I wanted something that can hold my soft flask with easily accessible pouches. I tried many other brands including Salomon Agile 250, and unfortunately, due to my small waist, I was unable to adjust the size to fit me properly. I'm 5'4, 127 lbs 26 inch waist and 35 hips, 36 rear circumference This belt works perfectly because it doesn't buckle or has straps to fasen. I ordered the xxs.xs and it fits perfectly, stays on my wasist, doest bounce. I have room for soft flask it came with (love it btw), gels, and fits the new iphone 11 with a case snug (since the front zipper pouch is stretchy) and fits the new iphone SE (2nd generation) 2020 with plenty of room for keys and Vera Bradly ID wallet.The back pouch holds the water with no issue accessing mid run. The only issue I had so far is one of the nylon straps you pull to clinch the belt for a more secure fit snagged (I mightve pulled too hard accidently). I had my mom sew it back for me and haven't had an issue since. Otherwise, I love how it has grippy inner linings so it wont slip. If I could change one thing it would be making the back velcro pouch a zipper. There's nothing wrong with the velcro (still works after many hot sweaty runs), just a personal preference because I like to shove snacks in there and like knowing I won't lose jelly beans mid run. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/73095773-nathan-ns4913-vaporkrar-running-fitness-waist-pack-with-soft-18oz](https://www.desertcart.us/products/73095773-nathan-ns4913-vaporkrar-running-fitness-waist-pack-with-soft-18oz) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-09-17*