Locked-In Warmth from the Ground Up.
Wader Base Layer Pants - Black
Locked-In Warmth from the Ground Up.
The Underline Wader Pant is built to keep you warm where it counts — under the waders, in the cold, and on the move. Lined with our proprietary GX2 thermal waffle fleece for heat retention and fitted with elastic foot stirrups to keep everything in place, these are your go-to base pants for long sits and hard walk-ins.
The slim profile layers clean without bulk, while the soft interior grid lifts moisture and keeps you dry from the inside out. Whether you’re busting ice or breaking daylight, they stay put, stay warm, and stay ready.
Bottom Size Guide
Product information
Not sure which size will fit best? Order more than one and keep what works. We will cover the exchange.
How It Works
Order confidently
If you are between sizes, add both to your cart.
Try it on at home
Make sure gear is clean and unworn when you test the fit.
Send back what does not fit
Use our free exchange process to return the extra size.
Keep hunting
We will make sure you end up with the right fit. No hassle, no wasted time.
The Details
-
Exchanges are free within 30 days of purchase. Start your exchange here.
-
Items must be clean, unworn, and with tags attached.
-
Refunds go back to your original payment method.
-
For international customers, exchanges are not available but returns are.
Why We Do It
Fit matters in the field. We would rather you order two and end up with the right size than settle for gear that does not feel right. Every piece is built to last a season and beyond, but only if it fits the way it should.
ROSCO BLUEPRINTS
We needed a base pant that actually works under waders. The Underline is lined with thermal waffle fleece for heat, finished with foot stirrups to lock it in place, and cut with a slim profile that layers clean. The interior grid lifts moisture while the exterior traps warmth so you stay dry, stay warm, and stay ready.
WHAT YOU NEED TO KNOW
Everything you need. Nothing you don't.
DETAILS THAT MATTER
- Thermal waffle-knit lining for breathable warmth
- Adjustable pull belt for secure, dialed fit
- Elastic foot stirrups to keep pant legs locked under waders
- Moisture-wicking grid interior
- Athletic fit for minimal bulk under layers
- Made for cold-weather waterfowl hunts
FIT & LAYERING
The right fit keeps you comfortable in the blind and on the move. Our system is built to layer clean, move quiet, and keep you ready from dawn to dark.
Fit Guide
Base Layers
Athletic cut, minimal bulk, built to stay put under pressure.
Mid Layers
Tailored warmth without bulk. Designed to move and insulate.
Outerwear
Classic fit with room to layer. Articulated and durable for weather and wear.
Layering System
Base: Moisture + Heat Balance
Starts next to skin. Wicks sweat, holds warmth.
Examples: GX2™ Base, Underline Wader Pant
Mid: Insulation + Mobility
Traps heat and flexes with you.
Examples: Wool 1/4 Zip, Waffle Flannel, Field Vest, Half-Zip
Outer: Weather + Durability
Blocks wind, rain, and brush. Keeps everything together.
Examples: Drylock™ Shell, Guide Pro Jacket
How to Layer
Cold, Static Hunts
Base: GX2™
Mid: Wool Sweater + Vest
Outer: Drylock™ Shell
Active Hunts / Long Walk-Ins
Base: GX2™ or Lightweight Hoodie
Mid: Flannel or Half-Zip
Outer: Guide Pro Jacket
Everyday / Crossover Wear
Base: GX2™
Mid: Wool 1/4 Zip
Outer: None or casual shell
WADER BASE ENGINEERING
THERMAL WAFFLE-KNIT LINING
Holds heat while allowing airflow to prevent overheating.
ADJUSTABLE PULL BELT
Cinches tight for comfort and stay-put wear.
ELASTIC FOOT STIRRUPS
Prevents ride-up during long hunts.
ATHLETIC FIT
Streamlined cut designed to layer clean under shells.
F.A.Q.
FABRIC CARE
How do I wash wool pieces?
Spot clean when you can. For bigger washes, use cold water, gentle cycle, and lay flat to dry. Do not tumble dry.
How do I wash technical shells?
Cold wash on gentle cycle with a tech wash (no fabric softener). Hang dry. This keeps waterproofing intact.
Can I machine wash flannels, hoodies, and fleece?
Yes. Cold wash, tumble dry low, no bleach.
Do dryers or irons damage gear?
Yes. Heat breaks down waterproof coatings and wax. Air dry everything to extend life.
How often should I reapply waterproofing?
When water stops beading on the fabric. For waxed canvas, apply a fresh coat of wax. For shells, use a spray-on or wash-in waterproofing treatment after cleaning.
FREE RETURNS & EXCHANGES
Not sure which size will fit best? Order more than one and keep what works. We will cover the exchange.
How It Works
Order confidently
If you are between sizes, add both to your cart.
Try it on at home
Make sure gear is clean and unworn when you test the fit.
Send back what does not fit
Use our free exchange process to return the extra size.
Keep hunting
We will make sure you end up with the right fit. No hassle, no wasted time.
The Details
-
Exchanges are free within 30 days of purchase. Start your exchange here.
-
Items must be clean, unworn, and with tags attached.
-
Refunds go back to your original payment method.
-
For international customers, exchanges are not available but returns are.
Why We Do It
Fit matters in the field. We would rather you order two and end up with the right size than settle for gear that does not feel right. Every piece is built to last a season and beyond, but only if it fits the way it should.