I just finished my first t-shirt quilt..and I used Pellon EK 130 Easy Knit Fusible Knit interfacing and underlining...it worked out great for me...fusing on one side...[ATTACH=CONFIG]391144[/ATTACH]it made the t-shirts very easy to work with..and crisp looking...I cut out the design larger than necessary..ironed on the fusible then trimmed to the size I wanted..good luck...