Propper Series 100® 6" Waterproof Side Zip Boot

Keep your feet moving and dry in the Series 100® Waterproof Boot. Manufacturerd with the highest quality materials, these boots will stand up to the tests of time. A premium memory foam insole adds a layer of all-day comfort for those long, demanding shifts. 

Availability: In stock
Propper Series 100 6" Waterproof Side Zip Boot F4521 is rated 4.3 out of 5 by 7.
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The waterproof leather and 1000D Cordura® upper of the Series 100® Waterproof Side Zip Boot can be pulled snug with the quick and easy NATO speed lace system. A special gusset behind the zipper helps keep water out while the triple-density rubber foundation and an arch made from a durable compound will hold up to the rigors of fast-roping. The Series 100® is a great value in footwear for street patrol/tactical, activity duty, safety professions and more. Propper® footwear was designed for long-lasting comfort and durability. All of our boots are based on true U.S. sizing to provide the perfect fit.

Rated 5 out of 5 by from Waterproof boots Shoes are made well and fit good. I like the zipper to help with both removal and putting on the boot
Date published: 2020-07-27
Rated 5 out of 5 by from WOW... perfect choice!! I got the Propper Series 100 6" and after a short time with them, I am really glad I did my homework. These boots fit GREAT, and are built for the type of enjoyment I associate with my Harley. Great grip, easy on and off, durable, and fit it exact as bought. No guessing (true to size) or concerns on size match. Great Job Propper !!
Date published: 2020-06-26
Rated 5 out of 5 by from Nice boots! Third pair I've bought The shoes are comfortable throughout my entire 8 hour shift in the nursing home. They're waterproof, fit really well, and support my ankles.
Date published: 2019-09-26
Rated 5 out of 5 by from Nice boot love them once they’re broken in I received these as a gift. Initially I thought they were too small. But after loosening them up and then getting them on they fit perfect.Out of the box these boots are a bit stiff. Thankfully I had time between when I received them and my range day to wear them a few times to break them in. Even then at the end of the day I wish I’d have spent more time breaking them in.My advice is to wear them an hour a day for a few days before wearing them all the time. If you do you’ll find they soften a bit and become perfect.Other than needing to be broken in, these boot are great, theyre just the right weight and they feel great.
Date published: 2018-09-03
Rated 4 out of 5 by from Good boots. Good boots. No break in required. Only thing I don't like is boot laces are too long. Reason for 4 stars.
Date published: 2018-09-17
Rated 1 out of 5 by from good design Right boot confertable left boot has wrinkle sowed in upper tong eyelet lining causing uncomfertable boot.
Date published: 2018-11-04
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What is the weight of the boots?

Asked by: Flash
The total weight of the boots is approximately 3.85 pounds.
Answered by: Propper - Casey
Date published: 2020-07-22

Can these boots be polished with regular shoe polish?

Asked by: Marvin
Yes, the boots can be polished with regular shoe polish.
Answered by: Propper - Casey
Date published: 2020-01-24

How warm are these boots? Are they good for winter?

Asked by: MikeG
Individual warmth is subjective, but these boots are waterproof and will keep off the snow.
Answered by: Propper
Date published: 2019-07-03

Am a size 12 regular in Asics running shoes. Would be the same in these one ??

Asked by: Savage
Our boots are true US sizing. We don't know how Asics sizes run, but if you are generally a size 12 in other shoes, the same size should work in our boots. Thanks for asking!
Answered by: Propper
Date published: 2018-09-12
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NTOA Member Tested and Approved


NTOA Member Tested and Recommended

With reviews from two different NTOA members, the Propper® Series 100 6" Side Zip Boot received their seal of approval garnering an overall score of 4.22 out of a possible 5 with its design, performance and durability praised across the board.


Reviewer 1

The Propper Series 100 Boots were found to be a very good quality boot. The boots are very lightweight and well-constructed. The outsole is oil and slip resistant. The zippered side made the boot very easy to get on and off. Some positive features of the Series 100 Boots are: made of a “polishable” cattle hide leather with 1000D nylon upper; an antimicrobial lining inhibits odor, promotes breathability and increases wear; the open cell air mesh foam keeps air circulating around foot for continual comfort; the washable open cell foam inserts conform to foot for balance and arch support; there is a fast-rope compatible arch that is built to handle ladders and fast-roping; a side zipper with hook-and-loop zipper guard offers convenient on/off and the coated speed lace hardware with 550 paracord lacing adds durability. My only complaint of the boots is they were lacking in the area of comfort since they were a little narrow in the toe area. A larger size or wide boot would have resolved this issue with a more custom fit. Having never owned a pair of Propper brand boots, I would consider purchasing a pair after this review.


Reviewer 2

I received a pair of Propper International Series 100 Men's Boots for evaluation. My initial thought was the boots were of superior quality. The side zipper is heavy duty, unlike other side zipper boots I have purchased. It took quite a long time for the boots to break in for me, even with wearing them every duty day and during SWAT training. I am not pleased with the side zipper. After 45 days of a breaking-in period, I have found that when the laces are tied and you un-zip the boot, I am still not able to pull the boots off without un-doing or loosening the laces. Maybe this will come with more breaking in time. Comfort of the boots is a big plus. They are light and I personally like the ankle support. Walking or running with these boots support your ankles and the soles cushion the bottom of your feet. I usually get a blister when breaking in new boots but had no soreness during the breaking in period with these. The tread gives great traction in all terrain and is large enough so small rocks and other debris will not lodge inside the tread. The boots are easy to clean. The leather and stitching is very high quality. I rated the boots lower in Ease of Use and Convenience simply because of the side zipper not allowing me to remove the boot without untying the laces. Overall I like these boots: design (except for the side zipper) comfort and ankle support are all positives.

  • Engineered using true US sizing for superior fit with excellent weight distribution for all-day comfort
  • Waterproof and seam-sealed with HyrdoGuard®
  • Polishable full grain leather
  • 1000D nylon upper
  • Triple row reinforced stitching
  • Friction-resistant speed lacing system with 550 paracord lacing
  • Arch design resists wear from ladders and fast-roping
  • Open cell air mesh foam provides full foot air circulation for maximum comfort
  • Breathable liner wicks and regulates temperature, treated with Aegis® to prevent odor
  • Premium memory foam insole
  • Oil- and slip-resistant rubber outsole for excellent traction and impact absorption
  • NTOA member tested and approved
  • FREE optional fit inserts included
  • Imported

boot size conversion chart