The soft, ring-spun cotton of this t-shirt is also long-lasting. With a classic fit and seam-free body, you'll want to wear it every day. 100% soft ring-spun cotton (Sport Gray is 90% ring-spun cotton, 10% polyester; Dark Heather is 65% polyester, 35% cotton.) Modern classic fit Tubular body Double-needle sleeve and bottom hems Taped neck and shoulders Ribbed collar Wash cool, hang dry or tumble dry low Cool iron inside-out

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This “What Part of This Don’t You Understand?” design featuring a detailed circuit diagram is perfect for electricians, engineers, and tech lovers who enjoy smart humor. Works great on t-shirts, hoodies, long sleeves, mugs, tumblers, and more. A clever and nerdy gift for electricians, STEM workers, students, and anyone who loves electrical schematics.