We do not have any single class of products that accounts for more than 10 percent of our sales. However, sales of our floorcovering products may be classified by significant end-user markets into which we sell, and such information for the past three years is summarized as follows: 2018 2017 2016 Residential floorcovering products 72 % 68 % 66 % Commercial floorcovering products 28% 32% 34% Our sales historically have normally reached their lowest level in the first quarter (approximately 23% of our annual sales), with the remaining sales being distributed relatively equally among the second, third and fourth quarters. Working capital requirements have normally reached their highest levels in the third and fourth quarters of the year. Our operations are subject to federal, state and local laws and regulations relating to the generation, storage, handling, emission, transportation and discharge of materials into the environment. The costs of complying with environmental protection laws and regulations have not had a material adverse impact on our financial condition or results of operations in the past. See "Risk Factors” in Item 1A of this report. Our primary raw material is bulk continuous filament for yarn. Nylon is the primary yarn we utilize and, to a lesser extent, wool and polyester yarn is used. Additionally, we utilize polypropylene carpet backing, latex, dyes and chemicals, and man-made topical applications in the construction of our products. Our synthetic yarns are purchased primarily from domestic fiber suppliers and wool is purchased from a number of international sources. Our other raw materials are purchased primarily from domestic suppliers, although the majority of our luxury vinyl tile is sourced outside the United States. Where possible, we pass raw material price increases through to our customers; however, there can be no assurance that price increases can be passed through to customers and that increases in raw material prices will not have an adverse effect on our profitability. See "Risk Factors” in Item 1A of this report. We purchase a significant portion of our primary raw material (nylon yarn) from one supplier. We believe there are other sources of nylon yarn; however, an unanticipated termination or interruption of our supply arrangements could adversely affect our supplies of raw materials and could have a material effect on our operations. See "Risk Factors” in Item 1A of this report. We use electricity as our principal energy source, with oil or natural gas used in some facilities for dyeing and finishing operations as well as heating. We have not experienced any material problem in obtaining adequate supplies of electricity, natural gas or oil. Energy shortages of extended duration could have an adverse effect on our operations, and price volatility could negatively impact future earnings. See "Risk Factors” in Item 1A of this report. We are required to maintain significant levels of inventory in order to provide the enhanced service levels demanded by the nature of our business and our customers, and to ensure timely delivery of our products. Consistent and dependable sources of liquidity are required to maintain such inventory levels. Failure to maintain appropriate levels of inventory could materially adversely affect our relationships with our customers and adversely affect our business. See "Risk Factors” in Item 1A of this report. At December 29, 2018, we employed 1,646 associates in our operations. Table of Contents 6 Employment Level Working Capital Utilities Seasonality Environmental Raw Materials