Update your closet today with Theory. Shop all the latest designer lingerie in our selection. The variety of styles on offer from Theory means there is something for everyone. High-quality materials, functionality and considered details are cornerstones of Theory's collection. Theory's lingerie will earn a place in your wardrobe for years to come. By taking time to care for your silk, you’ll ensure your item stays beautiful for years to come. Taking care of silk doesn’t need to be difficult, we recommend carefully following the care instructions on each individual silk product. Some silk products are labelled as strictly ‘Dry Clean Only’, while others have ‘Dry Clean’ as the recommended cleaning method but may also be hand washed or machine washed. We recommend hand washing inside out using cold water and a specialist detergent. Avoid spot cleaning silk, as rubbing in only one area can cause the material to lighten in just that spot. Silk should not be tumble dried, and instead can be laid flat to dry naturally. If machine washing is advised on the item’s care label, choose a gentle, lower-temperature spin cycle. Store in a cool, dry place, ideally folded in a breathable cotton bag. Discover the latest Theory lingerie on Lyst. Shop now for new arrivals.