What is the difference between the two size options?
1355798
The Fatboy versipack is pretty small but its perfect if you only carry a few things.It also lacks a water bottle pocket and I could hardly fit anything in the pockets like my tablet and cell phone. I returned mine and opted for the Jumbo version. A 7 inch tablet and cell fit perfect in the front zippered pocket to give you an idea. You might be able to fit a small laptop in the rear compartment but its meant for concealed carry. The inside is roomy enough to fit my small lunch containers. It is a bit heavy at times though depending on what I'm carrying. There are some reviews on YouTube that will give you a better idea. Good luck. The Fatboy versipack is pretty small but its perfect if you only carry a few things.It also lacks a water bottle pocket and I could hardly fit anything in the pockets like my tablet and cell phone. I returned mine and opted for the Jumbo version. A 7 inch tablet and cell fit perfect in the front zippered pocket to give you an idea. You might be able to fit a small laptop in the rear compartment but its meant for concealed carry. The inside is roomy enough to fit my small lunch containers. It is a bit heavy at times though depending on what I'm carrying. There are some reviews on YouTube... » Read More The Fatboy versipack is pretty small but its perfect if you only carry a few things.It also lacks a water bottle pocket and I could hardly fit anything in the pockets like my tablet and cell phone. I returned mine and opted for the Jumbo version. A 7 inch tablet and cell fit perfect in the front zippered pocket to give you an idea. You might be able to fit a small laptop in the rear compartment but its meant for concealed carry. The inside is roomy enough to fit my small lunch containers. It is a bit heavy at times though depending on what I'm carrying. There are some reviews on YouTube that will give you a better idea. Good luck. « Show Less
1690971
I've looked at both of them and can't figure out the difference. The measurements are nearly identical. The MODS is more expensive and I don't know what 'MODS' stands for. I have the less expensive one and it works well and has held up well. Sorry I can't be of more help.
2034919
I don't think there is a difference. I think both will fit a standard machine.
1793766
Huge difference. Please google the size difference and educate yourselfe. Please.
777466
There appears to be no difference in their specs. They are listed together. I suggest you call them directly. Sorry I could be so little help
250755
I'm still awaiting the answer to the question in regards to the sizes. Plus there is a Medium and a 19cm Medium. What's the difference? Negative comment need not apply.
398838
I did not really find any differences in the 'sizes'. I thought I bought 2 sizes, a Med for me, and a Small for my wife. But after using them both, I have yet to find out which is the smaller one. In reality, you must buy it and try it out. If you try it out, just remember to minimize any stubble around the mask / face interface. Also test the seal on the mask... meaning plug the side filter holes (with them off) and inhale. If the mask sticks to your face, you are good to go. If not, they the face / mask seal is bad. Sweat or Vaseline can help make that seal better. After all, that seal provides the filtration benefits you are purchasing the mask for.
844182
I had the same dilemma. Ended up order ing both sizes and returned the wrong one.
678590
I don't know the differences in sizes if the device. Sorry! I also have a mini iPad that I have in Belkin cover that is good but twice the money.
805080
I didn't see any difference between the two. Same amount of power, just fits better for me. My knee was hitting the cover on my big sucker, now it doesn't. This also performs well in the rain without the sock installed. Got stuck in heavy rain, thought it would start sucking water. But didn't skip a beat.
1077975
I bought them both. First I bought the age-appropriate, larger size. It was uncomfortable and difficult to remove causing more and more discomfort over the several days I needed it. I decided to take a chance and bought the smaller size because overall, I like the product concept. The smaller size is MUCH more comfortable and removal is not a problem. It still fits and does not feel as if it will "fall out" or anything like that. it's only slightly smaller, (more tapered,) with a slightly smaller ring at the top.
1002445
No difference. Think is different packaging. Just take note the volume. As I think it comes with 2 sizes.
1511912
There are two sizes, make sure you get the small one and it should fit nice
2043487
I also don't think there is a difference other than the size. I love it - hope you do also!
63424
They are the same size, they look smaller, but I just checked the difference between the two and they are the same size. Hope this helps
1376642
I have both versions available. Sorry for the confusion on the description I will change it as soon as possible.
1657072
I don't have the other size to compare. I do like the size I have. It's worth the price I paid for it.