The Zip Zap Coverall is a warm and cosy coverall (onesie) perfect for kids of all ages!Choose between a lined or unlined garment. You can add a zip guard or zip facing. Anoverlocker/serger will create the neatest finish but importantly, a sewing machine is all you need for all options. SKILL LEVEL: Adventurous Beginner - Intermediate. SIZING: Ages from 0/3 months - 12 years. Click here for the Waves & Wild size chart. For the Fabric Requirements, click here. SUPPLIES:Zip: One closed zip is required. See the table in Fabric Requirements for the length. Interfacing: A small amount of light/medium interfacing is required (less than 5cm by full width.) RECOMMENDED FABRICS:Main Fabric: Medium weight knit fabric, eg. cotton/Lycra french terry, fleece etc. Lighter weight knit fabrics such as cotton/Lycra jersey can be used but will make the finished garment feel larger. Lining Fabric: Medium weight warm stretch fabrics such as thin fleece. Thicker stretch fabrics such as sherpa/teddy can be used but are only recommended for those experienced at sewing zips. Facing Fabric: Any fabric from the main or lining lists. Stable/lower stretch fabrics are easier to handle here. Cuffs: Cotton/Lycra jersey or cotton/Lycra ribbing