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These sweatpants are made from an exceptionally heavy 825 GSM double heavyweight French terry, giving them a substantial, structured feel without compromising comfort. The fabric’s deep, earthy brown tone comes from naturally pigmented Foxfibre® cotton, further enriched through a traditional iron mordant treatment that will slowly darken and develop character with wear and sunlight. Knit in Wakayama, Japan, and cut in a modern straight-leg fit, they offer everyday functionality with an elevated sense of texture, weight, and craftsmanship.
| SIZE | S | M | L | XL | XXL |
| Waist (elastic) | 73 | 77 | 83 | 89 | 96 |
| Hip | 57 | 57 | 58 | 61 | 66 |
| Front Rise | 33 | 34 | 34.5 | 35 | 36 |
| Back Rise | 43 | 45 | 46 | 47 | 48 |
| Thigh | 32 | 33 | 34.5 | 35.5 | 37 |
| Knee | 24 | 25 | 26 | 27 | 28 |
| Leg Opening (elastic) | 21.5 | 22 | 23 | 24 | 25 |
| Inseam | 78 | 78 | 81 | 81 | 83 |
You can have your jeans hemmed with our vintage Union Special 43200G Chainstitching Machine. The cost for this service is €10,00 and will be added to your cart. Please remember that hemmed jeans or pants are non-returnable, so make sure to carefully check the size chart.
• It will take 4-5 additional business days.
• Please follow our measuring guide to check your inseam.
The Wonder Looper Sweatpants in Iron Mordant Foxfibre® Coyote 80 are made from one of the heaviest French terry fabrics in production today, weighing an exceptional 825 GSM (24.3oz/yd²). The deep, earthy brown tone is not created through conventional dyeing. Instead, it comes from Foxfibre®, a rare naturally pigmented cotton grown organically on a single-origin farm in New Mexico, and is further intensified through an iron mordant treatment. This traditional process causes the cotton’s natural tannins to react, deepening and maturing the color, which continues to slowly darken with wear and exposure to sunlight—developing a unique patina over time.
The Coyote 80 fabric blends 80% Foxfibre® with 20% organic Extra Long Staple cotton, giving the sweatpants a dense yet soft hand feel with excellent durability. Knit in Wakayama, Japan, on low-gauge (10G) circular knitting machines, the fabric features a richly textured exterior and large, comfortable interior loops, offering both structure and comfort.
These sweatpants feature a modern straight-leg fit, designed to be clean and wearable rather than slouchy. They include an elastic drawstring waistband, front slash pockets, a rear patch pocket, and ribbed side panels that provide better movement and visual structure. Finished with flat seam construction, they are built to last and made with the same level of craftsmanship found across Wonder Looper’s most sought-after garments.
Fit Notes: Despite being a Japanese brand, we find the sizing of Wonder Looper garments to be more Western than Japanese. If you usually wear a size M in American pants, you'll find a suitable fit with this piece in size M. However, as always, we recommend consulting our size chart for the perfect fit.
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Details
Shipping
Spain
FREE SHIPPING on orders over 100 EUR .
6 EUR shipping cost on orders under the value mentioned above.
European Union & The UK
FREE SHIPPING on orders over 150 EUR \\.
14 EUR shipping cost on orders under the value mentioned above.
Rest of the World
FREE SHIPPING on orders over 250 EUR .
25 EUR shipping cost on orders under the value mentioned above.
Returns
If for some reason you are not happy with your purchase you can return it to us within 14 days for a size exchange or refund.
For more info please visit our returns & exchange page.
Please note that items in the SALE category are considered FINAL SALE, with no returns or exchanges accepted.
Reviews
| SIZE | S | M | L | XL | XXL |
| Waist (elastic) | 73 | 77 | 83 | 89 | 96 |
| Hip | 57 | 57 | 58 | 61 | 66 |
| Front Rise | 33 | 34 | 34.5 | 35 | 36 |
| Back Rise | 43 | 45 | 46 | 47 | 48 |
| Thigh | 32 | 33 | 34.5 | 35.5 | 37 |
| Knee | 24 | 25 | 26 | 27 | 28 |
| Leg Opening (elastic) | 21.5 | 22 | 23 | 24 | 25 |
| Inseam | 78 | 78 | 81 | 81 | 83 |









