NPS (Solavair) Acorn Calf Chelsea Boots. Made in Northampton. The boots are expertly crafted with extreme attention to detail and design that the brand has been known for. However, it is the addition of tanned cowhides from Leather that really sets apart from the competition. Everyone loves a pair of chelsea boots. This pair will look great for several occasions. From a wedding to going out in the finest gear. Great design.