Small is Just enough for essentials. I fit 2-CO2 cartridges, inflator, multi tool, pressure gauge,tubeless tire plugger, 2 tire levers, mini jack knife, shock cord, and small plastic bag. I'm sure you could substitute a spare tube for the pressure gauge and one CO2, but I prefer to carry spare tubes in my jersey pocket.
Retention strap is simple, and keeps pack stable. Easy to attach and remove. Reflective side panels are a nice touch.
Saddle bags seem to be a dime a dozen these days, with options coming from every corner of the world at an array of prices. This bag however, is the 5th I have purchased, and the best of any I have tried.
Straps are excellent, very strong, easy to take on and off, and effectively compresses the bag down if it is not filled to capacity.
The material is strong, and the "reflective" aspect of the black sides is present, though placed above my flashing taillight I'm not entirely sure how much it matters. Either way, its a cool bonus feature.
It is waterproof, as much as I can tell. I got caught in a torrential downpour, and everything in the bag was dry as a bone afterwards.
I use a saddle bag for my MTB w/ dropper and while not a popular choice, I like to place my mobile phone plus a tube (a very light Tubolito 29). The Grid, Medium size fits both perfectly and does so in a svelte package.
The seatpost loop, according to Blackburn, is optional for this model. I use it with the dropper for added security, and hence lose a bit of usable drop for this bike, but that is worthy tradeoff for me
There aren't very many choices for a 1 1/2 liter pack and I like this one better than the only other one I was able to find (which was too long and skinny). The large size doesn't look or feel large on the bike but holds a lot. It holds a phone very nicely on the internal shelf (keeping it away from everything else in the bag). It's hard to find a bag that's the right size and shape to hold a phone but this one does. It doesn't have a key clip so I added my own. If you have a problem with the velcro rubbing on your shorts, it's probably because you have the grippy side out. All you need to do is reverse it so the fuzzy side is out.
I selected for a minimal size bag and fit a road tube, repair kit, air canister, tools and a bag with napkins, wipes, band aids and duck tape. There is still room for a wallet or cable lock. Bag is light and is water resistant with sealed zipper.
This is my second Grid Seat Bag, the first becoming unusable after the zipper did not track anymore. That being said, I got 8 years of service out of my first bag, so expecting the same here. The bag is ideal for most of my rides (I use a bar bag on long rides, however). Solid construction. One thing I do is to pack the bag and then cinch it down.
Works fine, very basic. Medium too small for cell phone in protective case. But holds patch kit, tire irons, basic tool kit, snack bar and keys and fits very well beneath the seat. Haven't ridden in rain yet, but looks like it will keep things dry for awhile.
Medium fits a tube, tire levers, couple CO2 cartridges and few hex wrenches with a little bit of room to spare. Not going to fit a smart phone in this. Would not want to go any smaller.
Size Med , but I ride tubeless tires, so no inner-tubes in my seatbag, so I could get by with a Small. Also, no tire irons or patch kit.
I have room for CO2 cart & chuck, 1st Aid Kit, micro Leatherman, Visine bottle of anti-bacterial soap, Topeak micro tool, chain Quick-Link, GU, CC-sized gate key, and 3,000mAh USB charger, although that might have to stay behind if I were using the small size. Lately I've been carrying a medicine bottle filled with GatorAid laid sideways across the top in back.
Love the reflective sides, they show up well at night, and in photographs using flash. Like the wrap-around main strap, and dust/waterproof zipper.
CAVEAT: The Velcro loop around the seatpost has a rough coating on it that will chew up the legs of your shorts. Replace it ASAP with something softer and non-abrasive. I remember distinctly writing Blackburn a nasty-gram 10yrs ago about this same issue. I used a Velcro strap with the soft, fuzzy side out. Works great.
The size is okay. Very small. Fits, small tool kit, co2, bacon strips and holder, no tube. Hard to attach to my selle saddle. Might be good on other saddles. I still like it. Just don't love it, which is okay.
I purchased this seat bag to replace a Blackburn bag I've used for years. I shopped other brands but decided on buying a Blackburn bag again. I went with the large size, its a bit bigger than I need but still not too large. The water resistant material, practical inner design and great zipper all are nice features. This bag also secures tightly - no worries of it becoming loose. In use for a couple months, no complaints. Great looking bag as well.
Needed a larger saddle bag to carry my new larger smartphone. It has two separate compartments separated by a soft liner to protect the phone from being scratched from tubeCO2 cartridge. I would have preferred Topeak type clips instead of a large velcro strap.
This bag is a little bigger than standard but great to hold an oversize phone, tools and a spare tube/co2 cartridge. made of smooth nylon so it doesn't rub
The large is a bit of a weird size. It is just a bit too small to fit a jacket, some tools, and a couple of bars. I would buy something 20% larger.
Quality is high, Zipper quality is high. It definitely keeps the contents dry during some moderate rain.
With this pandemic going on and needing a mask i needed more room for carrying a mask, didn't want to put it in jersey pocket. It also has given me room for small bottles of sunscreen, hand sanitizer and my wallet. Great buy.