Ultra-Sil Day Pack
January 12, 2010, 8:21 pm / Categories: Packs
It stuffs down to a size smaller than a baseball. Its manufacturer, Sea to Summit Inc. of Perth, Australia, suggests using it as a keychain. But unpack the Ultra-Sil Day Pack and its crinkly “siliconized” Cordura nylon quickly takes shape, a backpack materializing from a tiny ball right in front of your eyes.
As outdoors products go, the Ultra-Sil Day Pack is certainly strange. It is far from technical gear. The backpack, a basic sack equipped with shoulder straps, carries its stowed items with scant support. Lumps protrude from the thin fabric where a shoe or a water bottle might be stuffed inside. Objects dig into your back.
But what this $28 backpack lacks in performance it gains in improbable convenience. The Ultra-Sil Day Pack weighs just 2.4 ounces. It fits in any pocket. Unzipped and open, there’s about 20 liters of space inside — enough area to stow a day’s worth of supplies while travelling.
The company (www.seatosummit.com) markets the Ultra-Sil as a “super strong pack that clips on your keychain to shoulder groceries or scramble a summit.” You could easily put it in your pants pocket and bike to the store, load in groceries, and wear it home.
Other uses for the water-resistant pack include carrying wet gear after a day outside. Stash your sweaty clothes in the pack after a triathlon or other event. The company mentions using the pack for “messy stuff” like dirty laundry after a weekend of camping.
I might think twice before scrambling to the aforementioned summit with this pack. But in a pinch, if the Ultra-Sil is what’s available, this siliconized sack with shoulder straps can do the job. It can carry water, food, some gear, and extra clothing layers for a hike.
Indeed, Sea to Summit has tested the pack for maximum weight. The fabric used for the pack, which has bar-tack reinforced stitching at stress points, resists loads of up to 350 pounds, the company cites. But a company representative said this much weight far exceeds suggested use amounts. The spokesperson expanded, “It’s likely they’ll cut their arms off before they reach their destination.”
—Stephen Regenold writes about outdoors gear at www.gearjunkie.com.
Good idea, but I have some doubts about the durability.
Hammock Bliss makes one that may not fit on your keychain, but it won’t blow out either. This always travels with me.
http://www.hammockbliss.com/Ultralight_travel_daypack.html
Also, REI has a “house brand” sack that has gotten pretty good reviews.
Awesome looking “Useful Bag”! I need this bag to take to CONvergence (Four day annual convention in Bloomington MN for fans of Science Fiction and Fantasy in all media). I would be the envy of the other 5,000 attendees, and I would tell each and every one of them about Gear Junkie! This bag could hold my water bottle, snacks, books, and spare socks for the convention. Thanks for the chance to win.
The locals where I work are interesting so I walk with the company receptionist at lunch four days a week. Friday I walk alone and there is a bit of open space about a mile from my desk with a rock face above a kettle pond. If I race up there I can sit down and for a short time pretend I’m in the wilderness. A pack like this would make it easier to carry my lunch.
Seems like a great bag for packing up my trail running gear. I tossed out an old gear bag about a month ago because somehow my car keys fell out of it. Sadly, they fell out somewhere in the 20 feet between my house door and the car and haven’t been seen since. Not sure how that’s even possible, but this bag, thanks to being able to clip to a keychain, appears to be the solution I’ve been looking for.
This bag would be awesome for my wife and I, with our many, upcoming, planned adventures. With trips planned over the next 2 years to Norway, Belize, Fiji, Nepal, and Northern Canada, this bag would easily transport during flights, and be EXTREMELY useful for life in general.
This is a great pack. You can stuff it down to the size of a pair of socks and carry it along to use as a summit bag; you can put it in your car and pull out it when you need to buy groceries or pick up some organic veggies at the farmers market; its super light weight, pretty darn durable; and provides an ample amount of storage. I used mine on the last mile of the summit of Mt. Whitney last summer. My kids are always taking mine…
I will be going to British Columbia this summer to do some backpacking around glaciers and glacial lakes. We are planning to have some day hikes, and I don’t wan’t to use my 75 liter pack for a day trip, and I want to keep my stuff safe from the ice and frigid water. This pack would be super light, super secure, and a great size for those day trips, and it would be a pleasure to take it along with me!
This is exactly what I need for paddle trips. I like to get out of the boat and take a short hike now and then, and just need to bring along a few essentials. I hate to carry a regular daypack for just a few short uses, or carry a large drybag just for a water bottle, first aid kit, and a snack. This is small and light enough to go in a dry bag or even my overnight backpack and forget about until I decide to strike off, and don’t feel like carrying ALL of my stuff. Perfect.
PS- I should also win because my initials are GJ, and I am a Gear Junkie. Worth a shot…
I believe that when my wonderful wife looks upon me instead of seeing the bearded man that I am, she sees me as a pack mule (at times a spider killer as well). This is partially my own fault for establishing the role as official family sherpa when we started dating, but a problem often arises when we encounter stuff we want or need. I’m almost always limited to what I can carry by having only two arms and small pockets on most of my clothes. And since I don’t like carrying empty bags on my back in case something strikes her fancy, there’s almost no solution in site. Until now…
This actually sounds useful as a human bus/bike train I can see this coming in handy when I go to pick up the kids from school and they are bringing home a big art project I wasn’t expecting. Just pull this puppy out and instant trunk space on the bike. Or the impromptu stop at a farmers market and discovering peaches are ripe early. The uses seem endless, perhaps I’ll get to try this out…
When you walk around the city you need a waterproof bag 4 save your laptop. In the forest to save map and robe. Climbing to put the food and the vine for the top. Sailing to protect the GPS. I don’t know where I’ll am next time. I prefere have a Ultra-sil always with me.
I could use this for paddling, biking and hiking (like everyone else) but really the possibilities are endless. A few other uses that come to mind are rescuing small mammals from trees, transporting my latest basil harvest or carrying my grandmother’s “special” items on our Sunday outings.
I was in a car accident five years ago and lost the ability to hike. I use to do 500 miles per summer but now I am only able to walk 2.75 miles per day. I always carry and emergency pack with te essentials and am always looking for ways to lesson the weight. This day pack is exactly what I need to continue my progress towards getting back on the trail.
I could use one for Hiking, Hunting and Fishing with my boys. It never fails, somebody is gonna get muddy. This would be awesome to throw some clothes in for the return trip. It could carry clean clothes there and the dirty clothes back.Not to mention a little extra room for the first aid kit.
I often carry a ‘drawstring’ backpack around in my seat bag as an emergency ‘extra storage’ solution while on the bike. Nice to carry a 6 pack on your back instead of precariously on your handlebars while going the 5 miles from the liquor store to the beach after work. This looks even smaller and lighter with better straps than a drawstring pack. Great work Sea to Summit!
The uses and convenience this pack offers are endless! It would be great for use going to and from the local produce stand/market, going along on treks with the dog along the trail or on the bike for rides, perfect for storing or safe-keeping for surprise rainstorms on a motorcycle, it would be ideal for a “go along” bag on the many trips I take every year for work as a travel agent all over the world and all conditions. This bag is the answer to so many needs for everyone!
I’m constantly in need of “just a little more space”, and since I shredded my last musette bag that hung out in the bottom of my pannier, I’ve been caught without enough capacity more than once. I’ve also gotten in the habit of taking the bare minimum for most adventures, and this might be the perfect way to reduce that mass a little more on lightweight overnights on foot.
I just moved out of the city and into the wilderness for graduate school. I’m noticing that the cheap gear I currently own isn’t made to last a while, and I’m going to need something that will make it until I have my Master’s degree. I’ll probably have to tote around some textbooks with my gear, but this pack looks positively wonderful.
I would use this pack almost everyday! Ive hiked 14ers in Colorado and didnt habe a nice pack like this one! I rock climb and hike around Devils Lake weekly so this would be amazing to have then I could finally retire my school back pack that is almost 10 years old! :) Please pick me!
I need this pack because when i’m traveling with my big 70L. backpack, I always bring my smaller day pack(which still take a lot of place) for walking around, My day backpack is awesome and all, but its a real pain when it comes to changing locations: I have the huge 70L. pack on my back and the 30L. day pack on my front. With this awesome Ultra sil day pack, I can just fold it up and put it in my pocket, or use it as padding for beer mugs and such in the larger pack on my way back home!
Let me explain why this pack would prove useful for me.
My brother and I have spent the last 18 months design and constructing a time machine. We have laboured both mentally sand physically collecting parts and simulating tests over the computer. We should be putting on the finishing touches next week and I have drawn the short straw to guinea pig it.
We’ve arranged for only ourselves to be transported through the time machine during our simulated computer experiments. We’ve also tested many times with “carry-on” object to no avail. That’s where you come in!
The Sea to Summit Ultra-Sil Day Pack would be the perfect piece of gear to travel through time with me! With it’s ability to compact into an seemingly invisible physical state is unparalleled technology! The pack will allow for storage of essential items along my journey and will also mystify and excite the folk of the time era in which I’m travelling to (still undecided).
Please consider my plea for help!
This would be the perfect pack to solve my problem of stopping at the grocery store on my bike ride home from work and accidentally grabbing more than I can carry. It also looks useful for carrying a few essential items on day hikes from a base camp. Thanks for the chance to win!
I would love this bag because it’s a great summit bag. Just enough to stuff down and hang off your big bag until summit day. Enough to hold some trail mix and a hat, and easy to change. I’ve been needing a bag like this because the other summit bags take up to much room! But I do need one that is small enough, but that can still carry the goods. I climbed Mt. St Helens and my other bag just took to much space, this bag would be great for my next climb! Mt. Adams! :D
An ultra sil day pack is the perfect thing to stuff in your down parka when walking through airport security with pockets filled to the brim with climbing gear or food, two carryons, and a helmet of some sort. Instantly transform to and from a 3rd carryon with no weight consequences.
- Weekly E-Newsletter
Sign up for our e-news for a weekly update on new gear, adventure travel, and prize giveaways.
- Latest Articles
- 'Beyond the Drop' Film features Mexico, Kayak Culture, Huge Hucks off Waterfalls
- Adventure Race Training Camp with Team GearJunkie/YogaSlackers
- Least-Fit in USA? Oklahoma City Ranks Unhealthiest Place to Live
- How To: Dress for a Desert Trek in Jordan
- Stunt Rider Danny MacAskill tackles 'Toy Story' world in new video
- High School Athletes Dominate in 'Extreme Wolverine' Obstacle Race
- $159 for Single-Speed 'Mountain Bike' from Mongoose (sold at Walmart)
- Rivers of America Revealed in Fine Detail on new Vector Map
- Best Reader Mountain Bike Photos (The North Face contest Winners)
- Our New Running Cap? It's Made of Wool
- Popular Articles
- Rivers of America Revealed in Fine Detail on new Vector Map
- Best Gear of 10 Years!
- Stunt Rider Danny MacAskill tackles 'Toy Story' world in new video
- The Lukla Airport Experience | Everest Expedition
- Least-Fit in USA? Oklahoma City Ranks Unhealthiest Place to Live
- How To: Dress for a Desert Trek in Jordan
- Adventure Race Training Camp with Team GearJunkie/YogaSlackers
- $159 for Single-Speed 'Mountain Bike' from Mongoose (sold at Walmart)
- 'Beyond the Drop' Film features Mexico, Kayak Culture, Huge Hucks off Waterfalls
- Workout Wear
- 'Fat Bike' Trend: Overrated or For Real?
- Camping Gear Reviews | Gear Reviews
- Call from Anywhere. SPOT launches Satellite Phone for Outdoors
- World's 10 Most Dangerous Mountains
- Survival Gear: 10 Items To Survive
- Fat Bike trend Dead? Walmart sells 'Beast' bike for $199
- High School Athletes Dominate in 'Extreme Wolverine' Obstacle Race
- SylvanSport GO Camper Trailer Review
- First Look: Suunto 'Ambit 2' for multisport market
- Our New Running Cap? It's Made of Wool
- Friends of Gear Junkie
- Monopoint Media
- The Goat
- Alpinist
- Adventure Blog
- YogaSlackers
- Checkpoint Tracker
- Outdoorzy
- Get Outdoors
- Gear Flogger
- Feed The Habit
- Gear.com
- Adventure Journal
- SuperTopo
- Trailspace
- Outside Online
- iRunFar.com
- UpADowna
- About Adventure Travel
- Cold Splinters
- UpNorthica
- Sender Films
- Venture There
- Wend Magazine
- No Boundaries
- Breathe Magazine
- Elevation Outdoors
- Rock and Ice Magazine
- Trail Runner Magazine
- REI Blog
















You forgot to mention one of the greatest uses of this bag;
Shove it in your suitcase when traveling. It’s perfect for those trips that are not hiking vacations but there may be a walk in the mountains or a trip to the open air market.
Also, Its been to the gym a dozen times already with me since I received it from a good friend for Christmas!