These 3507s were modified to resemble discontinued fire boots such as Red Wing's 4473 or 4273. In order to achieve this, the standard speedhooks of the 3507s were replaced with eyelets, and zippers originally intended for Red Wing's 4273s were applied.  

These boots run true to size. I normally wear US 10.5D boots, and 10.5D 3507s fit quite well. 

A packing slip will be provided with the boots that shows the Item Subtotal, Shipping Cost, Sales Tax, and Order Total. In case the boots are to be used for work in a company that helps cover the cost of footwear, the packing slip should qualify as a proper receipt that can be shown to one's employer.

It's worth mentioning all 3507s posted here are Factory 1sts.

Posted below is a link to various Red Wing Shoes care products I have available. If anything else is purchased within a few hours of buying the boots, I’ll be able to combine the orders and ship everything together. If the link doesn’t work, search for ‘Misc care’ on my store page and the listing should pop up.

https://www.ebay.com/itm/115157354228