Heather Shadow
Designed for cold-weather performance, the Flex Thermal baselayer combines ultra-soft brushed fabric with high-stretch and moisture management to keep you warm, dry, and unrestricted. The Original 3D Patented Pouch supportive fit, and engineered construction, make it ideal for layering during winter adventures or everyday cold-weather comfort.
The brushed recycled polyester interior provides soft warmth and moisture management, while spandex delivers high stretch, recovery, and support.
Waistband: 60% Polyester, 25% Recycled Polyester, 15% Spandex
Designed for secure hold without rolling or digging in.
SHORT FEATURES
Free standard shipping is available on all orders above $75 (after discounts and before taxes).
All available shipping options will be visible at checkout. We ship orders within 1-2 business days, but this can increase during promotional periods.
We offer a 30-day return window for all purchases made directly through our website. To submit a return request, please use our online portal: returns.bn3th.com.
For more information, check out our Frequently Asked Questions page.
Mid-Weight warmth, stretch, and support where it matters most. Built for cold weather layering.
Warmth
Stay Dry
No Stink
Chafe-Free
Features That Perform
THE ORIGINAL 3D PATENTED POUCH
The Original 3D Patented Pouch is engineered to lift, support, and separate, creating a natural space that eliminates friction and the need for constant adjustment. The result is a secure, comfortable fit that moves with your body all day.
INSEAM GUSSET
A gusset extends through the inseam to enhance mobility, reduce friction, creating an unrestricted fit.
BRUSHED WARMTH
Brushed 4-way stretch fabric creates a soft next-to-skin feel while helping trap warmth for comfortable cold-weather wear.
ENGINEERED COMFORT
WHY WE MADE THIS
SUSTAINABILITY MATTERS
