Shop our fantastic collection of leather Solovair boots and shoes below. NPS Shoes, who produce Solovair (sole-of-air) footwear, was established in Wollaston, Northamptonshire in 1881 and has over 130 years of shoemaking experience. Our range of Solovair Goodyear welted styles include Derby shoes, Chelsea boots and laced boots. Most styles are unisex and suitable for men or women, and every pair is handmade from start to finish in the UK. Due to supplier policies, we can only ship this brand to UK and ROI.