This bag is very nice and very large. Worth the price. I did have to return because my boyfriend said it was too big and heavy for his use. I’d say if you need a very large bag with lots of compartments this is for you.Was hesitant - not sure why. Is it a satchel, a suitcase, or perilously close to a purse? None of the above; it’s a gear bag, and a really good one. Wondering why I waited so long. No more ski mornings going through my dilapidated mental check-list to make sure I have everything. This thing does it for you. There are discrete compartments for your boots, helmet, even goggles and gloves. Also another “utility” pocket. I would recommend just getting the largest size, regardless of your boot size.I stick it in the back of my crew cab and it acts like a locker. Put ski boots on, place snow boots in bag, get helmet, change lenses if needed, select gloves (it easily holds 2-3 pairs of variable warmth ski gloves), hit the trails. No worries - if you’re looking at it, you probably need it. Click on ‘buy”.It took me a few tries, but finally figured out the best way to arrange my gear and get it all in. very happy with it.I was recently asked if it would fit 31.5 boots, that's a boot size of 13.5 US. You will need the check the boot sole size noted on the heel of your boot.It just happens that a 10.5 boot size is 31.5 MM long which is different that a 31.5 Mondo size boot which boot sole length may change by boot manufacturer.I did more research to determine what a 31.5 Mondo is. Based on manufacturers 31.5 is between 342-370 mm. the bag is 14.96 inches back to front which equals 529mm. That should fit!I fit my quad skates in the "boot" area and then the large top portion holds my knee pads, elbow pads, wrist pads, and helmet. The small front pocket is for tools and socks and such. Perfect for traveling with my skates and great for storing all my gear at home. 10/10 recommend.I read a lot of reviews of this bag prior to purchasing. It appears a lot of people think they should be able to fit snowpants and clothes in a boot bag. Boot bags are meant for your BOOTS, helmet goggles, gloves, hats. And a few other small items. This bag fits those items perfectly. A ski bag is where those other clothing items should be placed. So if you’re reading this review ignore those reviews bc this is a boot bag and it is literally doing its job. Tbd on quality and how it holds up to the test of time. Cant comment on that as I just received it.It is a great backpack, robust, comfortable and good appearance. The only reason I don’t give a 5 star because it is smaller than indicated, but it is a great product.Fits my boots and helmet perfectly and seems durable despite the low cost.I love this bag! I am very pleased with it. It fits my boots, helmet, goggles, and all my other ski clothing. It’s also very comfortable to wear as a backpack and does not feel heavy when carrying. It’s also easy to store in my basement. Over all very pleased!