At the crossroads of academia and design, SINE & COSINE merges mathematical clarity with historical inspiration. The Amsterdam-based footwear analyses the defining elements of classic designs with precision and clarity with each detail being carefully evaluated, embraced for its timelessness or refined to align with modern sensibilities as seen with the Hannes Chelsea Boot Black.

The Hannes Chelsea Boot is handcrafted in Portugal. The upper is made from buffalo calf leather and the lining from soft cow leather. The upper sits atop a leather frame sole and an Italian-made Vibram sole. Side zip. Square toe design. Leather pull up loop at back. Dust bags.

Colour: Black. Composition: Upper: 100% buffalo calf, Lining: 100% cow, Frame sole: 100% cow. Vibram Tuscany outsole.