3.1 Phillip Lim
Silk Zip Sweatpants

Silk Zip Sweatpants - style: tracksuit pants; waist detail: elasticated waist, belted waist/tie at waist/drawstring; pocket detail: small back pockets, pockets at the sides; waist: low rise; predominant colour: black; occasions: casual, evening, work; length: ankle length; fibres: silk - 100%; hip detail: front pleats at hip level, fitted at hip (bottoms); material texture: silky; trends: aquatic, sports luxe; texture group: silky - light; fit: baggy

What the retailer says

Navy blue silk sweatpants featuring an elasticated waistband with drawstring detail two conealed side pockets and a single buttoned jet pocket to back. 3.1 Phillip Lim trousers have a two-way zip fastening running down the outside of leg that enable trousers to be a slightly looser fit when unzipped. Trousers have a 28 inch inside leg an 11 inch rise and a 12 inch leg opening when zips are closed. Model is a standard UK 8 and is wearing a size US 4. This item runs true to size.