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Iron Heart 634S (21 oz.)

Originally designed as motorcycle armour, the Iron Heart 634S is the benchmark for heavyweight denim. Haraki-san’s debut pair for the brand, this 21 oz. classic balances toughness and comfort like few others. The denim wears slow, breaks in beautifully, and delivers years of service—making it a rite of passage for fade-focused denimheads.

Engineered for the Road—Refined for the Long Haul

• Originally built for motorcycle riders who needed protection, this was Iron Heart’s first jean—and it still defines the brand
• The 21 oz. denim doesn’t fade fast, but it does fade beautifully—ideal for those who love the slow burn
• Woven from long-staple cotton, the fabric softens considerably after a few washes, yet remains almost indestructible

For those who’ve gone through half a dozen brands in search of the perfect fit, the 634S often marks the end of the hunt. Designed to wear with boots but adaptable enough for sneakers, the fit sits in the Goldilocks zone: mid-rise, straight but not boxy, slim but not tight.

The denim that helped ignite the heavyweight revolution, Iron Heart’s 21 oz. selvedge is armour for the road and a canvas for your journey. With enough patience, this pair transforms into something uniquely yours.

Samurai S710XX (19 oz.)

Introduced in 2003, the S710XX has become a cult classic. It captures everything Samurai stands for: heritage detailing, cutting-edge fading, and bold, uncompromising construction. Built from slubby #5 x #4 yarns, the fabric is rugged on the outside and surprisingly soft on the inside—designed to wear hard and fade fast.

Zen and the Art of Indigo Destruction

• Samurai’s most iconic pair, cut from rugged 19 oz. denim with legendary fading potential
• Silver-thread selvedge ID and jacquard-lined waistband reinforce the brand’s deep storytelling
• One-wash treatment softens the fabric and removes shrinkage, so they’re ready to roll

Built with Samurai’s signature precision and flair, the S710XX balances clean lines with just enough taper. The mid-rise fit accommodates athletic and average builds alike, with sharp contrast fades emerging after just a few months of steady wear.

From the iron sunrise buttons to the sheep leather patch and “impermanence” waistband lining, this pair is a statement—about time, wear, and the fleeting beauty of indigo.

Samurai is also available at: Blue in Green (US), Redcast Heritage (ES), and Brooklyn Clothing (CA)

Big John RARE R009 (15.5 oz.)

A quiet standout from the originators of Japanese denim. With decades of innovation behind it, the RARE R009 is a masterclass in subtlety—engineered for fade fanatics who appreciate understated details and uncompromising construction. Every stitch, fibre, and finish reflects Big John’s workwear legacy and modern precision.

Subtle Strength, Decades Deep

• Big John’s signature RARE denim, designed with engineered slub for textured vertical fades
• “Wrench Proof” reverse-twist leg construction prevents bias twist during wear
• Reinforced stitching with hidden blue poly thread and heavy pocket bags for daily durability
• No chain stitch hem—more stable, less unravel, but easily re-hemmed for roping fades

Built with the quiet confidence of Japan’s original jeans maker, the RARE R009 blends sharp construction with understated style. Slim through the thigh and snug at the knee, they’re ideal for comb-heavy fades and everyday wear. These are jeans for denimheads who value precision over flash—and who appreciate the art of ageing well.

Big John is also available at: Redcast Heritage (ES), Okayama Denim (JP), and Blue in Green (US).