Cricut Sportflex Iron On BlackOnly from Cricut. Made especially for activewear, SportFlex Iron-On features the StrongBond Guarantee for long-lasting iron-on results that stick. Run, swing, kick, dance, do that cobra pose, and more: this flexible, stretchable iron-on material bends with the body and keeps uniforms and team gear lightweight. Customize team jerseys, or embellish uniforms, caps, yoga tops, leggings, and more. SportFlex Iron-On is highly recommended for tech fabrics like polyester and nylon. Use with all Cricut cutting machines. Contains 1 sheet 11.8 x 24 in. of Cricut SportFlex Iron-On in Black.