AT A GLANCE

The Bajío Nato is the brand’s flagship large-coverage frame, purpose-built for
serious time on the water. Named after a legendary guide from Xcalak
(pronounced ish-ka-lak), Mexico, the Nato’s bold silhouette, oversized temples,
and best-in-class optical technology make it one of the most compelling options
on the market for anglers who demand elite performance from their eyewear.

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TECHNICAL SPECIFICATIONS

Collection – Cast Collection
Frame Size – Extra-Large Fit
Frame Material – Castor-based bio-polycarbonate (bio-based nylon)
Frame Style – Bold, squared full-wrap with oversized temples
Lens Base – 8 Base
Lens Options – Glass (polarized) or Polycarbonate (polarized)
Lens Technology – LAPIS™ — blocks 95% of bad blue light (up to 445 nm)
Polarization – Yes, all variants
Lens Colors – Blue Mirror, Gray, Copper, Green Mirror, Silver Mirror,
Rose Mirror, Violet Mirror
Frame Colors – Matte Black, Dark Brown Tortoise Gloss
Nose Pads – Ergo rubber — slip-resistant in heat and sweat
Temple Tips – Rubber-tipped for secure grip
Hinges – Flex hinges for adaptive fit
Keeper Holes -Yes, lanyard compatible
Retail Price – $269 USD

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FIELD PERFORMANCE

OPTICAL CLARITY & FISH SPOTTING

The Nato’s LAPIS™ (blue light-blocking) technology is Bajío’s technological crown jewel and it is a genuine visual differentiator. Blocking 95% of bad blue light up to 445 nm, the lenses minimize the scatter and haze that diminishes contrast in high-glare
environments. For anglers scanning shallow flats for permit or trout holding
in glare-heavy riffles, the resulting increase in visual acuity is not subtle. Fish that would otherwise disappear into the bottom structure become findable.

Compared to competing premium brands, Bajío’s blue light management stands out
as measurably superior in lab comparisons, filtering more bad blue light while
preserving the color-accurate channels the eye relies on for depth perception
and edge detection.

GLASS VS. POLYCARBONATE LENS CHOICE

The Nato is offered in both glass and polycarbonate configurations, an
important distinction for experienced anglers who know their conditions and
preferences.

Glass Lenses:
Deliver superior scratch resistance and razor-sharp optical clarity, ideal
for long days when visual fatigue matters most. The trade-off is added weight
and fragility.

Polycarbonate Lenses:
Offer greater impact resistance and reduced weight, making them preferable
for guides and anglers spending multiple consecutive days on the water or in
situations where physical abuse is likely.

For most saltwater applications, bonefish, permit and tarpon – glass is the
recommendation. For multi-day river wade trips with frequent lens contact and
rough conditions, polycarbonate offers a more durable solution.

LENS COLOR SELECTION FOR FLY FISHING

Lens color selection is one of the most consequential choices an angler makes,
and Bajío’s range covers the full spectrum of fishing conditions:

Blue Mirror:
Best for offshore, bright open-sky days with maximum glare. Not ideal for
shallow-water reading.

Green Mirror:
The workhorse for flats and inshore fishing. This color enhances contrast in shallow,
turbid, or tannic water where bottom differentiation is critical.

Copper:
Low-to-mid-light all-rounder; excellent for overcast days and shadowed
canyon rivers.

Gray:
Neutral color rendering for anglers who want accurate light transmission
without tint bias. Ideal for technical dry fly work where precise drift
reading matters.

Violet / Rose Mirror:
Dawn and dusk low-light performance, useful in winter tailwater scenarios
or early morning saltwater pushes.

FRAME PERFORMANCE & COVERAGE

The Nato’s full-wrap, 8-base geometry combined with oversized temples delivers
measurably superior sidelight blocking compared to smaller or shallower frames.
For anglers on early morning bonefish flats or dealing with late afternoon glare on a western river this peripheral coverage eliminates the need to reposition your body or shield your eyes manually. The bold square profile also reduces reflected light bouncing off the water’s surface from oblique angles, a common issue with rounder or smaller-lensed frames.

FIT, COMFORT & ALL-DAY WEARABILITY

The Nato’s extra-large fit is purpose-built for larger face profiles but the
design accommodates it without sacrificing comfort. The bio-based nylon frame
material defies expectations for a frame of this coverage: it is noticeably
lighter than comparable polycarbonate competitors. Ergo rubber nose pads and
temple tips provide a secure, non-slip interface even in Florida heat, salt
spray, and sweat. The flex hinge system allows the frame to adapt to different
head widths without pressure points, which matters on day six of a week-long
trip when everything is either loose or too tight.

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BEST APPLICATIONS FOR THE PROFESSIONAL ANGLER

The Nato is not a one-size-fits-all pair of sunglasses, it is a specialist tool. Its
extra-large coverage and 8-base geometry make it most valuable in these
conditions:

• Saltwater flats fishing | bonefish, permit, tarpon | where sun angle, wind
  glare, and white-sand substrate create extreme light environments.
• High-elevation western rivers | particularly in early season when water
  clarity is exceptional and bottom-reading depth perception is essential.

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FINAL VERDICT

The Bajío Nato earns its place among the best fishing sunglasses on the
market. For the professional guide, competitive angler, or serious fly fisher
who spends hundreds of days per year on the water, the LAPIS™ lens technology
is not a marketing feature, it is a functional advantage. The reduction in
eye fatigue over long days translates directly into sharper fish-spotting
performance.

The only meaningful caveats are the extra-large fit (try before you buy) and the premium price. Both are justified by the engineering and real-world performance they offer. Whether you’re chasing permit on the flats, hunting spring creek browns in the tail of a riffle, or running offshore canyons for dorado, the Nato delivers the visual edge serious anglers demand.

Seven items, guaranteed to keep you warm and dry while Fly Fishing.

Our first snap of relatively cold and wet weather is behind us.  That said, the conditions have made for some spectacular scenery on the river and it is a welcome change after a long and dry summer.

Unfortunately, these conditions have a dark side.  A dark side that has the ability to immediately cut short a great day of fly fishing. If you are unprepared for things like sudden wind squalls, surprise snow flurries and cold rain you will certainly find yourself running to the truck and seeking shelter in a warmer place and by all accounts, it’s very difficult to get a great drift from the parking lot.

Thus, we at Park City Fly Fishing Guides have decided to share some knowledge about surviving colder and unpleasant weather conditions while fly fishing.  Most of this knowledge has been gained through our personal experience and we have personally used all items mentioned in this post.  They all meet our high standards of quality and build. Furthermore, we assure you that this post is free from any marketing or business to business shenanigans that may compromise our credibility in this regard.

#1 Rain Jacket

While people are often amazed that we’ll be out fishing in sub-zero temperatures in the winter, few realize that it’s actually much colder to be fishing in 50 degree weather with driving rain and a little wind. Thats because 10 below is dry. It’s the wet that makes you cold, so the number one piece of gear to keep you warm is a QUALITY rain jacket. We like Simms and there’s not a better solution than the legendary Simms Guide Jacket. Gore-tex, a big hood, storm flaps and cuffs that let the water run off and not in.

#2 Synthetic “Puffy”

Patagonia coined the term years ago and we all love a our”Puffy”. Patagonia makes a great one, but we prefer the Simms version. Bottom line, they all have similar properties. They are very light, exceedingly warm, dry quickly and work when wet. That last one is huge for fly fisherman as we are constantly putting our hands in the water to release fish. We also have our casting hand in the up position all day, which lets water run down our arm. We like the lightweight versions and use them as layering garments under our rain jackets. Number two on our list, but a must-have. No really cheap way to do this – the cheapies usually suck – but you can often find good deals on last years colors.

#3 Gloves

While many are on the never ending quest to find the perfect fishing gloves (we don’t think they exist), we think it’s much more important to keep your hands warm than worrying about how well you can tie a blood knot with them on.

We believe Kast makes the best fishing glove on the market. They are comfortable, super warm and waterproof.  They fit perfectly to size and for the most part, you can fish with them on.  Gripping fish is possible and when you dunk your hands for the release these gloves stay dry.  They’re also tactile and durable enough for rowing.

 

 

#4 Boot Fit Waders

Yes, they are expensive, and it’s often difficult to get the Simms model (which is the best by miles), but they are a total game-changer for those who fish where or when it’s often chilly. You will completely forget that your feet ever got cold while fishing. An added bonus is that they are easy on and off, which is great at the end of a cold day. We can’t recommend these enough.

#5 Mr. Buddy Heater

A lot of people carry these in the drift boat, and they are almost a fixture in Winter Steelhead country.  We’re not really a fan of these things in the boat, but if you’re staying in a tent or the back of your truck, we find them extremely helpful when trying to stay a bit warmer in shelter.  They have built in shut off controls to keep you from asphyxiating on carbon monoxide or catching on fire if you happen to knock it over.  Not likely to compensate for a warm shower and bed but still a nice touch. 

#6 Microfleece Pants

A comfortable pair of pants that comfortably sit against your skin and layer effectively under your waders is essential to staying warm on the river.  Denim is a poor choice and we have found that microfleece is superior to most.  Like the “Puffy” there are many options out there and we have found the Simms version to be the most wader friendly.  We also like the Patagonia “Snap T Synchilla Pant”.  They look a little less like long underwear.

#7 Muck Boots

Full credit for our knowledge here must be given to the boys and girls at “The Reef Fly Shop” in Alcova Wyoming.  No one else fishes harder in crazier weather! These boots get the nod for providing full protection from water, mud and snow when your waders come off.  They are the champions from the takeout to basecamp and we don’t leave home without them from November to April.  

 

 

 

 

I am an angler that constantly struggles with my love/hate relationship with my waders.  Don’t get me wrong, I am LOVING them in the middle of Winter, Spring, and Fall when their layers of Gore-Tex are keeping me warm and allowing me to fish when and wherever I want.  But man, I am HATING them when its 80 and sunny and I will have nothing to do with them past the middle of June. 

In fact, I look forward to wet wading into that cool, crisp and flowing water for the first time every year.  It wakes me up, it viscerally connects me to the water and makes me feel at ease and comfortable with the river again. It is almost perfect in every way. 

Except

Unfortunately, there has always been this element that hasn’t been quite perfect.  This part of the routine that seems compromised.  This parlay between total freedom and protection called the “Wading Boot”.

I’ve tried to overcome it in many different ways.  I’ve tried Chacos, with and without socks, and learned how devastating a small pebble can be when its stuck under your arch all day.  I’ve tried water shoes, hiking boots and even flip flops.  They all fail on some level. 

In the end, I always return to my oversized, heavy and uncomfortable wading boots. I’ve had pairs that are better than others, but lets be honest. They’ve never been designed for this purpose alone.

Until now | The Simms Intruder

This year, Simms has introduced the Intruder, a product that claims to have been exclusively designed for the “Wet Wader” in all of us.

Bridging the Gap

Functionally, I have been impressed with almost every one of the boot’s unique design features.  The built in neoprene cuff works flawlessly. Not too tight and not too loose. I have had zero debris enter my boots. Sizing is spot on with my street shoes and the lacing system is good. They feel light and athletic and the construction is minimalist in nature with no unnecessary materials to absorb and hold water. They have a slim profile and the Vibram sole is grippy, by far the best of any rubber sole I’ve used. It is also available in a hybrid rubber/felt variation.

Most importantly, the comfort level is off the charts for a wading boot.  I have seen some reviewers compare them to a light 3/4 top hiking boot.  I would take it a step further and compare them to a nice pair of high top sneakers.  In fact I’m going to start calling them my “Stream Jordan’s”.

Durability seems adequate and I have not seen any signs of premature wear and tear.  Time will tell. I will update this post when the season begins to wind down.

On the slight downside, it took me a minute to figure out the best way to get them off and on. The cuff isn’t the easiest thing to get your foot into while standing on one leg and it definitely requires a tailgate or bumper assist to slip them on. Really, a small price to pay.

Conclusion

Ultimately, I have been profoundly satisfied with these boots. My feet feel good after a long day on the river and I feel somewhat liberated in my pursuit of a perfect wet wading boot.

I recommend them to guides and weekend warriors alike.  They are available at simmsfishing.com and retail for 179.95.