Specialty retailer of leather outerwear and apparel, Wilsons The Leather Experts Inc, has slashed its full-year earnings guidance to 51-56 cents a share from 88-93 cents a share amid a slump in sales at its travel-related stores. The Minneapolis-based retailer said those stores were experiencing lower-than-expected sales and margins but that its core stores, which account for around 85 per cent of its total revenue, are performing in line with expectations.