Proof
72-Hour Merino Chino - HB Straight
72-Hour Merino Chino - HB Straight
Story
If you were to pick one pant—make it merino
Built for everyday life, with the range to travel and move when needed.
The Proof team didn’t start with an off-the-shelf fabric. They spent two years working directly with their mills and factories to build a merino wool blend from the ground up—testing, refining, and wearing it through long workdays, late dinners, travel that blurs together, and light adventures off the grid. Nothing like it existed on the market.
The result is the 72-Hour Merino Chino—a modern pant designed to replace denim and traditional chinos first, while doing more when the day demands it. Cut like your favorite jeans, it stays fresh for days, moves comfortably, and looks right wherever you wear it. Polished enough for everyday wear and office environments. Easy enough for travel. Ready when plans change.
Features
- Merino wool blend wicks moisture away from your skin, naturally regulates your temperature, and resists odors for 72+ hours of wear
- Durable water-repellent finish (DWR) protects you from unexpected rain showers
- Stretches for all-day comfort and a full range of motion on long treks
- Classic chino styling with slant front pockets and welt back pockets
- Stealthy zip pocket on the back right for securing valuables and EDC essentials
- Sharp design looks put-together enough for the office, but is also ready to tackle whatever the day throws your way
Sizing & Fit
- Standard sizing - take your normal size
- HB Straight™ is the original fit. Straight through the hip and thigh with a slightly tapered leg
- Backed by our HB Fit Guarantee: If for any reason you don’t love your pants, we’ll issue a full refund or replacement within 30 days–no questions asked
- For the absolute best fit, measure one of your best fitting pairs of pants and compare to the garment measurements below
Garment Measurements
| 28 | 29 | 30 | 31 | 32 | 33 | 34 | 36 | 38 | |
|---|---|---|---|---|---|---|---|---|---|
| Waist | 30¼ | 31¼ | 32¼ | 33¼ | 34¼ | 35¼ | 36¼ | 38¼ | 40¼ |
| Thigh | 11⅝ | 11⅞ | 12⅛ | 12⅜ | 12⅝ | 12⅞ | 13⅛ | 13⅝ | 14⅛ |
| Leg Opening | 7⅛ | 7¼ | 7⅜ | 7½ | 7⅝ | 7¾ | 8⅛ | 8⅜ | 8½ |
All measurements are in inches.
How to Measure - Waist: Align the front and back waistbands so they’re stacked on top of each other, then measure from edge to edge across the middle of the waistband, multiply by 2 - Thigh: Starting 1" below the crotch seam, measure straight across from edge to edge (not from seam to seam) - Leg Opening: Measure across the bottom hem from edge to edge - Inseam: Measure from the crotch seam down to the bottom of the leg hem, following along the inside of the leg
Materials & Care
- Body Fabric: 47% Merino Wool, 33% Nylon, 14% Polyester, 6% Elastane (247 gsm)
- Pockets: 92% Polyester, 8% Spandex
- DWR coating is C0 PFC-Free
- Made in Indonesia with wool sourced from Australia
- Machine wash cold with like colors, Tumble dry low, Gentle cycle, Do not use softeners, Cool iron if needed
About the 72-Hour Collection
The team at PROOF created performance gear that can be worn for 72 hours straight without showing any signs of wear—or, you know, odor. It’s built from the softest and strongest merino wool on the planet. To back up that claim, we’ve packed pieces from the 72-Hour Collection on demanding excursions around the world—from Iceland and the Swiss Alps to Mexico City and even our own backyards. Turns out, this temperature-regulating gear isn’t just for adventure, it’s also a bestselling pick for everyday wear.
The Sweat Test Guarantee
Put your new Proof gear through its paces. If it does not meet your expectations, we'll accept your dirty laundry and issue a refund, no questions asked.
Terms and limitations here
