Zip Tie Certified - Heather Gray T-Shirt. Spreading Laughter & Pride Across Blue Collar Job Sites Nationwide.. Our 30-Day Guarantee, Quality & Customer Service is Second to None!. 🇺🇸 Designed, Printed & Shipped in the USA! 🇺🇸. All items are in Stock & Ready to Ship.. Premium Quality Cotton/Poly Blend. Will Not Shrink, Fits True To Size.. All Items Are Created Using the Latest Techniques in High-Quality Apparel Printing.. Sizes up to 5XL.