Yarn containing predominantly but 85 synthetic staple fibres by weight other than that mixed principally or solely with cotton wool or fine animal hair excl sewing thread yarn put up for retail sale and yarn of polyester acrylic or modacrylicstaple fibres

Could you correct the punctuation please?
Yarn containing predominantly, but < 85% synthetic staple fibres by weight, other than that mixed principally or solely with cotton, wool or fine animal hair (excl. sewing thread, yarn put up for retail sale and yarn of polyester, acrylic or modacrylicstaple fibres)