Hicks 697 Waterproof Siopor Overalls. Conforms to the EN 343 standard. SIOPOR Regular: 100% polyester fabric (plain weave) with 100% PU coating + 155 g/m. Water repellent outer fabric. Supple & lightweight. Sleeve & ankle narrowing through press studs. Elasticated waist in the back allows for easy adjustment. Strong taped seams.