Design the Knights warm up shirt! Custom Team Warm up Shirts SewSporty Team Athletic Gear & Rowing Buy Custom Sublimated Corporate Polo Shirt SP23 Online Polo t shirt Design Your Own Custom Warm Up Clothes Custom T Shirts for Sporting Out New Customink Warmup Shirts! Shirt. Netball warm up shirts inspired by Sharni Layton. Design your own custom warmup top for your team or club using our templates. Change the colours, add Logos, Team Name, Player Names and more using our product designer. Click "CUSTOMISE IT" which will load a new screen in the designer tool. Minimums are only 5 pieces. Your uniforms will be sublimated on performance fabrics in your design, plus you can save the design and email it to yourself. If you need to re order, click the link in your emailed design and it will bring you back to the pre designed product.